diff --git a/.gitignore b/.gitignore
index 48835df..2122d6d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /build/
+.vscode
 *.user
diff --git a/README.md b/README.md
index 79bc825..9949216 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ Compositors that are known to support the protocol are [Sway] and [Wayfire].
 The goal of this project is to allow precise adjustment of display settings in
 kiosks, digital signage, and other elaborate multi-monitor setups.
 
+
 ![Screenshot](wdisplays.png)
 
 # Installation
@@ -70,8 +71,16 @@ It's intended to be the Wayland equivalent of an xrandr GUI, like [ARandR].
 Sway, like i3, doesn't save any settings unless you put them in the config
 file. See man `sway-output`. If you want to have multiple configurations
 depending on the monitors connected, you'll need to use an external program
-like [kanshi] or [way-displays]. Integration with that and other external
-daemons is planned.
+like [kanshi] or [way-displays].
+
+When you apply a new change, the setting will be defaultly added to $HOME/.config/kanshi/config,
+if there is already a profile for the same monitors combination, the change will be applied on
+existing one.
+you can add kanshi autostart to your sway config:
+```
+exec kanshi
+exec_always kanshictl reload
+```
 
 ### How do I add support to my compositor?
 
diff --git a/src/meson.build b/src/meson.build
index 08830e9..8527452 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -20,6 +20,7 @@ executable(
     'outputs.c',
     'overlay.c',
     'render.c',
+    'store.c',
     resources,
   ],
   dependencies : [
diff --git a/src/outputs.c b/src/outputs.c
index a5007e8..5108f61 100644
--- a/src/outputs.c
+++ b/src/outputs.c
@@ -28,6 +28,8 @@
 #include "wlr-screencopy-unstable-v1-client-protocol.h"
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
 
+extern int store_config(struct wl_list *outputs);
+
 static void noop() {
   // This space is intentionally left blank
 }
@@ -52,6 +54,11 @@ static void config_handle_succeeded(void *data,
   struct wd_pending_config *pending = data;
   zwlr_output_configuration_v1_destroy(config);
   wd_ui_apply_done(pending->state, pending->outputs);
+  if (store_config(pending->outputs) == 0)
+  {
+    wd_ui_show_error(pending->state,
+      "Change was applied successfully and config was saved.");
+  }
   destroy_pending(pending);
 }
 
diff --git a/src/store.c b/src/store.c
new file mode 100644
index 0000000..6dab784
--- /dev/null
+++ b/src/store.c
@@ -0,0 +1,279 @@
+#include "wdisplays.h"
+#include <ctype.h>
+#include <regex.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <wayland-client-protocol.h>
+#include <limits.h>
+#include <stdbool.h>
+#define MAX_NAME_LENGTH 256
+#define MAX_MONITORS_NUM 10
+struct wd_head_config;
+struct profile_line {
+  int start;
+  int end;
+};
+char *get_config_file_path() {
+    char defaultPath[PATH_MAX]; // platform based marco PATH_MAX    
+    char wdisplaysPath[PATH_MAX];
+    // if $XDG_CONFIG_HOME is set, use it
+    {
+      const char *configDir = getenv("XDG_CONFIG_HOME");
+      char defaultConfigDir[PATH_MAX];
+      if (configDir == NULL) {
+        const char *homeDir = getenv("HOME");
+        if (homeDir == NULL) {
+          perror("Cannot find home directory");
+          return NULL;
+        }
+        snprintf(defaultConfigDir, sizeof(defaultConfigDir), "%s/.config", homeDir);
+      } else {
+        snprintf(defaultConfigDir, sizeof(defaultConfigDir), "%s", configDir);
+      }
+      snprintf(defaultPath, sizeof(defaultPath), "%s/kanshi/config", defaultConfigDir);
+      snprintf(wdisplaysPath, sizeof(wdisplaysPath), "%s/wdisplays/config", defaultConfigDir);
+    }
+
+    FILE *wdisplaysFile = fopen(wdisplaysPath, "r");
+    if (wdisplaysFile != NULL) {
+        char line[LINE_MAX]; // LINE_MAX is a platform based marco
+
+        // try to match "store_path" term
+        while (fgets(line, sizeof(line), wdisplaysFile) != NULL) {
+            if (strstr(line, "store_path") != NULL) {
+                // if found, extract path
+                char *pathStart = strchr(line, '=');
+                if (pathStart != NULL) {
+                    pathStart++; // skip '='
+                    char *pathEnd = strchr(pathStart, '\n');
+                    if (pathEnd != NULL) {
+                        *pathEnd = '\0'; // replace '\n' with '\0'
+                        fclose(wdisplaysFile);
+                        return strdup(pathStart); // return path
+                    }
+                }
+            }
+        }
+        fclose(wdisplaysFile);
+    }
+
+    // if store_path is not found in wdisplays config file, return default path
+    return strdup(defaultPath);
+}
+
+struct profile_line match(char **descriptions, int num, char *filename) {
+  struct profile_line matched_profile;
+  matched_profile.start = -1;
+  matched_profile.end = -1;
+  // -1 means not found
+  FILE *configFile = fopen(filename, "r");
+  if (configFile == NULL) {
+    perror("File open failed.");
+    return matched_profile;
+  }
+  // buffer to store each line
+  char buffer[LINE_MAX];
+  char profileName[MAX_NAME_LENGTH];
+  int profileStartLine = 0; // mark the start line of matched profile
+  int profileEndLine = 0;   // mark the end line of matched profile
+
+  int lineCount = 0; // current line number
+
+  while (fgets(buffer, sizeof(buffer), configFile) != NULL) {
+    lineCount++;
+
+    // check if "profile" keyword is in the line
+    if (strstr(buffer, "profile") != NULL) {
+      // extract profile name
+      sscanf(buffer, "profile %s {", profileName);
+
+      // the number of matched outputs
+      uint32_t profileMatchedNum = 0;
+
+      // record the start line of the profile
+      profileStartLine = lineCount;
+
+      while (fgets(buffer, sizeof(buffer), configFile) != NULL) {
+        lineCount++;
+
+        // check if the profile ends
+        if (buffer[0] == '}') {
+          profileEndLine = lineCount;
+          break;
+        }
+        char outputName[MAX_NAME_LENGTH];
+        // 从当前行提取输出名称
+        char *trimmedBuffer = buffer;
+        while (isspace(*trimmedBuffer)) {
+          trimmedBuffer++; // skip leading spaces
+        }
+        sscanf(trimmedBuffer, "output \"%99[^\"]\"", outputName); // extract output name
+
+        // check if the output name is in the descriptions
+        bool matched = false;
+        for (int i = 0; descriptions[i] != NULL; i++) {
+          if (strcmp(outputName, descriptions[i]) == 0) {
+            matched = true;
+            profileMatchedNum++;
+            break;
+          }
+        }
+
+        if (!matched) {
+          // if any output is not matched, break
+          profileMatchedNum = 0;
+          break;
+        }
+      }
+
+      if (profileMatchedNum == num) {
+        printf("Matched profile:%s\n", profileName);
+        printf("Start line:%d\n", profileStartLine);
+        matched_profile.start = profileStartLine;
+        printf("End line:%d\n", profileEndLine);
+        matched_profile.end = profileEndLine;
+
+        fclose(configFile);
+        return matched_profile;
+      }
+    }
+  }
+
+  fclose(configFile);
+  printf("Cannot find existing profile to match\n");
+  return matched_profile;
+}
+
+int store_config(struct wl_list *outputs) {
+  char *file_name = get_config_file_path();
+  char tmp_file_name[PATH_MAX];
+  sprintf(tmp_file_name,"%s.tmp",file_name);
+
+  char *descriptions[MAX_MONITORS_NUM];
+  for (int i = 0; i < MAX_MONITORS_NUM; i++) {
+    descriptions[i] = NULL;
+  }
+
+  char *outputConfigs[MAX_MONITORS_NUM];
+  for (int i = 0; i < MAX_MONITORS_NUM; i++) {
+    outputConfigs[i] = (char *)malloc(MAX_NAME_LENGTH);
+  }
+
+  struct wd_head_config *output;
+  int description_index = 0;
+  wl_list_for_each(output, outputs, link) {
+    struct wd_head *head = output->head;
+
+    // for transform
+    char *trans_str = (char *)malloc(15 * sizeof(char));
+    switch (output->transform) {
+    case WL_OUTPUT_TRANSFORM_NORMAL:
+      strcpy(trans_str, "normal");
+      break;
+    case WL_OUTPUT_TRANSFORM_90:
+      strcpy(trans_str, "90");
+      break;
+    case WL_OUTPUT_TRANSFORM_180:
+      strcpy(trans_str, "180");
+      break;
+    case WL_OUTPUT_TRANSFORM_270:
+      strcpy(trans_str, "270");
+      break;
+    case WL_OUTPUT_TRANSFORM_FLIPPED_90:
+      strcpy(trans_str, "flipped-90");
+      break;
+    case WL_OUTPUT_TRANSFORM_FLIPPED_180:
+      strcpy(trans_str, "flipped-180");
+      break;
+    case WL_OUTPUT_TRANSFORM_FLIPPED_270:
+      strcpy(trans_str, "flipped-270");
+      break;
+    default:
+      strcpy(trans_str, "normal");
+      break;
+    }
+
+    if (description_index < MAX_MONITORS_NUM) {
+      descriptions[description_index] = strdup(head->description);
+      // write output config in given format
+      sprintf(
+          outputConfigs[description_index],
+          "output \"%s\" position %d,%d mode %dx%d@%.4f scale %.2f transform %s",
+          head->description, output->x, output->y, output->width,
+          output->height, output->refresh / 1.0e3, output->scale, trans_str);
+      description_index++;
+    } else {
+      free(trans_str);
+      printf("Too many monitor! 10 is the");
+      return 1;
+    }
+
+    free(trans_str);
+  }
+
+  int num_of_monitors = description_index;
+
+  struct profile_line matched_profile;
+  matched_profile = match(descriptions, num_of_monitors, file_name);
+
+  if (matched_profile.start == -1) {
+    // append new profile
+    FILE *file = fopen(file_name, "a");
+    if (file == NULL) {
+      perror("File open failed.");
+      free(file_name);
+      return 1;
+    }
+    fprintf(file, "\nprofile {\n");
+    for (int i = 0; i<num_of_monitors;  i++) {
+      fprintf(file, "    %s\n", outputConfigs[i]);
+      free(outputConfigs[i]);
+    }
+    fprintf(file, "}");
+    fclose(file);
+  } else if (matched_profile.start < matched_profile.end) {
+    // rewrite correspondence lines
+    FILE *file = fopen(file_name, "r");
+    if (file == NULL) {
+      perror("File open failed.");
+      free(file_name);
+      return 1;
+    }
+    FILE *tmp = fopen(tmp_file_name, "w");
+    if (tmp == NULL) {
+      perror("Tmp file cannot be created.");
+      fclose(file);
+      free(file_name);
+      return 1;
+    }
+    char _buffer[LINE_MAX];
+    int _line = 0;
+    int _i_output = 0;
+    while (fgets(_buffer, sizeof(_buffer), file) != NULL) {
+      if (_line >= matched_profile.start && _line < matched_profile.end - 1) {
+        if(_i_output>=num_of_monitors){
+          perror("Null pointer");
+          fclose(tmp);
+          fclose(file);
+          return 1;
+        }
+        fprintf(tmp,"    %s\n",outputConfigs[_i_output]);
+        free(outputConfigs[_i_output]);
+
+        _i_output++;
+      } else{
+        fprintf(tmp,"%s",_buffer);
+      }
+      _line++;
+    }
+    fclose(file);
+    fclose(tmp);
+    
+    remove(file_name);
+    rename(tmp_file_name, file_name);
+    free(file_name);
+  }
+
+  return 0;
+}
\ No newline at end of file