diff --git a/config b/config
index a7e13bc4cd..84f717218f 100644
--- a/config
+++ b/config
@@ -222,6 +222,7 @@ NGX_ADDON_SRCS="$NGX_ADDON_SRCS \
                 $ngx_addon_dir/src/ngx_http_lua_phase.c \
                 $ngx_addon_dir/src/ngx_http_lua_uthread.c \
                 $ngx_addon_dir/src/ngx_http_lua_timer.c \
+                $ngx_addon_dir/src/ngx_http_lua_config.c \
                 "
 
 NGX_ADDON_DEPS="$NGX_ADDON_DEPS \
@@ -272,6 +273,7 @@ NGX_ADDON_DEPS="$NGX_ADDON_DEPS \
                 $ngx_addon_dir/src/ngx_http_lua_probe.h \
                 $ngx_addon_dir/src/ngx_http_lua_uthread.h \
                 $ngx_addon_dir/src/ngx_http_lua_timer.h \
+                $ngx_addon_dir/src/ngx_http_lua_config.h \
                 "
 
 CFLAGS="$CFLAGS -DNDK_SET_VAR"
diff --git a/src/ngx_http_lua_config.c b/src/ngx_http_lua_config.c
new file mode 100644
index 0000000000..38e20b960c
--- /dev/null
+++ b/src/ngx_http_lua_config.c
@@ -0,0 +1,32 @@
+
+/*
+ * Copyright (C) Yichun Zhang (agentzh)
+ */
+
+
+#ifndef DDEBUG
+#define DDEBUG 0
+#endif
+#include "ddebug.h"
+
+
+#include "ngx_http_lua_config.h"
+
+
+void
+ngx_http_lua_inject_config_api(lua_State *L)
+{
+    /* ngx.config */
+
+    lua_newtable(L);    /* .config */
+
+#if (NGX_DEBUG)
+    lua_pushboolean(L, 1);
+#else
+    lua_pushboolean(L, 0);
+#endif
+
+    lua_setfield(L, -2, "debug");
+
+    lua_setfield(L, -2, "config");
+}
diff --git a/src/ngx_http_lua_config.h b/src/ngx_http_lua_config.h
new file mode 100644
index 0000000000..9f85f31b3c
--- /dev/null
+++ b/src/ngx_http_lua_config.h
@@ -0,0 +1,19 @@
+
+/*
+ * Copyright (C) Yichun Zhang (agentzh)
+ */
+
+
+#ifndef _NGX_HTTP_LUA_CONFIG_H_INCLUDED_
+#define _NGX_HTTP_LUA_CONFIG_H_INCLUDED_
+
+
+#include "ngx_http_lua_common.h"
+
+
+void ngx_http_lua_inject_config_api(lua_State *L);
+
+
+#endif /* _NGX_HTTP_LUA_CONFIG_H_INCLUDED_ */
+
+/* vi:set ft=c ts=4 sw=4 et fdm=marker: */
diff --git a/src/ngx_http_lua_util.c b/src/ngx_http_lua_util.c
index a90825fb9f..33ac849ce1 100644
--- a/src/ngx_http_lua_util.c
+++ b/src/ngx_http_lua_util.c
@@ -46,6 +46,7 @@
 #include "ngx_http_lua_uthread.h"
 #include "ngx_http_lua_contentby.h"
 #include "ngx_http_lua_timer.h"
+#include "ngx_http_lua_config.h"
 
 
 #if 1
@@ -770,6 +771,7 @@ ngx_http_lua_inject_ngx_api(ngx_conf_t *cf, lua_State *L)
     ngx_http_lua_inject_socket_udp_api(cf->log, L);
     ngx_http_lua_inject_uthread_api(cf->log, L);
     ngx_http_lua_inject_timer_api(L);
+    ngx_http_lua_inject_config_api(L);
 
     ngx_http_lua_inject_misc_api(L);
 
diff --git a/t/114-config.t b/t/114-config.t
new file mode 100644
index 0000000000..3a3f9d27c5
--- /dev/null
+++ b/t/114-config.t
@@ -0,0 +1,33 @@
+# vim:set ft= ts=4 sw=4 et fdm=marker:
+use lib 'lib';
+use t::TestNginxLua;
+
+#worker_connections(1014);
+#master_on();
+#workers(2);
+#log_level('warn');
+
+repeat_each(2);
+
+plan tests => repeat_each() * (blocks() * 3);
+
+#no_diff();
+#no_long_string();
+run_tests();
+
+__DATA__
+
+=== TEST 1: ngx.config.debug
+--- config
+    location /t {
+        content_by_lua '
+            ngx.say("debug: ", ngx.config.debug)
+        ';
+    }
+--- request
+GET /t
+--- response_body_like chop
+^debug: (?:true|false)$
+--- no_error_log
+[error]
+