diff --git a/src/config/parse_config.h b/src/config/parse_config.h
index fb086a6..d420ba0 100644
--- a/src/config/parse_config.h
+++ b/src/config/parse_config.h
@@ -50,7 +50,7 @@ typedef struct {
 	int isunglobal;
 	int isglobal;
 	int isoverlay;
-	int monitor;
+	const char *monitor;
 	int offsetx;
 	int offsety;
 	int width;
@@ -1416,7 +1416,7 @@ void parse_config_line(Config *config, const char *line) {
 		rule->isoverlay = -1;
 		rule->isterm = -1;
 		rule->noswallow = -1;
-		rule->monitor = -1;
+		rule->monitor = NULL;
 		rule->offsetx = 0;
 		rule->offsety = 0;
 		rule->nofadein = -1;
@@ -1460,7 +1460,7 @@ void parse_config_line(Config *config, const char *line) {
 				} else if (strcmp(key, "tags") == 0) {
 					rule->tags = 1 << (atoi(val) - 1);
 				} else if (strcmp(key, "monitor") == 0) {
-					rule->monitor = atoi(val);
+					rule->monitor = strdup(val);
 				} else if (strcmp(key, "offsetx") == 0) {
 					rule->offsetx = atoi(val);
 				} else if (strcmp(key, "offsety") == 0) {
@@ -1953,10 +1953,21 @@ void free_config(void) {
 	if (config.window_rules) {
 		for (int i = 0; i < config.window_rules_count; i++) {
 			ConfigWinRule *rule = &config.window_rules[i];
-			free((void *)rule->id);
-			free((void *)rule->title);
-			free((void *)rule->animation_type_open);
-			free((void *)rule->animation_type_close);
+			if (rule->id)
+				free((void *)rule->id);
+			if (rule->title)
+				free((void *)rule->title);
+			if (rule->animation_type_open)
+				free((void *)rule->animation_type_open);
+			if (rule->animation_type_close)
+				free((void *)rule->animation_type_close);
+			if (rule->monitor)
+				free((void *)rule->monitor);
+			rule->id = NULL;
+			rule->title = NULL;
+			rule->animation_type_open = NULL;
+			rule->animation_type_close = NULL;
+			rule->monitor = NULL;
 			// 释放 globalkeybinding 的 arg.v（如果动态分配）
 			if (rule->globalkeybinding.arg.v) {
 				free((void *)rule->globalkeybinding.arg.v);
diff --git a/src/maomao.c b/src/maomao.c
index c686a01..1c7a400 100644
--- a/src/maomao.c
+++ b/src/maomao.c
@@ -1104,7 +1104,6 @@ void applyrules(Client *c) {
 	/* rule matching */
 	const char *appid, *title;
 	unsigned int i, newtags = 0;
-	unsigned int mon_idx;
 	const ConfigWinRule *r;
 	Monitor *mon = selmon, *m;
 	Client *fc;
@@ -1131,10 +1130,10 @@ void applyrules(Client *c) {
 		newtags |= (r->tags > 0) ? r->tags : 0;
 
 		// set monitor of client
-		mon_idx = 0;
 		wl_list_for_each(m, &mons, link) {
-			if (r->monitor == mon_idx++)
+			if (regex_match(r->monitor, m->wlr_output->name)) {
 				mon = m;
+			}
 		}
 
 		// set geometry of floating client
@@ -1193,9 +1192,10 @@ void applyrules(Client *c) {
 	setmon(c, mon, newtags, !c->isopensilent);
 
 	if (!c->isopensilent && c->mon &&
-		!(c->tags & (1 << (c->mon->pertag->curtag - 1)))) {
+		((c->mon && c->mon != selmon) ||
+		 !(c->tags & (1 << (c->mon->pertag->curtag - 1))))) {
 		c->animation.tag_from_rule = true;
-		view(&(Arg){.ui = c->tags}, true);
+		view_in_mon(&(Arg){.ui = c->tags}, true, c->mon);
 	}
 
 	setfullscreen(c, fullscreen_state_backup);