diff --git a/README.md b/README.md
index 32663d8..4cce834 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,15 @@ math_algorithm
 ==============

 Use Common Lisp to implement it.
+
+Use ASDF build math_algorithm
+1、(push "/home/tyrion/Document/math_algorithm/" asdf:*central-registry*);
+2、(asdf:compile-system :com.gigamonkeys.math-algorithm);
+3、(asdf:load-system :com.gigamonkeys.math-algorithm);
+
+Test and Use:
+1、(in-package :math-algo)
+2、(my-sqrt 2)
+
+
+
diff --git a/math_algorithm.asd b/math_algorithm.asd
deleted file mode 100644
index 2af23c2..0000000
--- a/math_algorithm.asd
+++ /dev/null
@@ -1,21 +0,0 @@
-(defpackage :com.gigamonkeys.math-algorithm-system
-  (:use :asdf :cl))
-
-(in-package :com.gigamonkeys.math-algorithm-system)
-
-(defsystem math_algorithm
-  :name "math_algorithm"
-  :author "Tyrion Lannister <Tyrion.Lannister.274AL@gmail.com>"
-  :version "0.1"
-  :maintainer "Tyrion Lannister <Tyrion.Lannister.274AL@gmail.com>"
-  :license ""
-  :description "Only used for learn Common Lisp."
-  :long-description ""
-  :components
-  ((:file "packages")
-   (:file "abs" :depends-on ("packages"))
-   (:file "average" :depends-on ("packages"))
-   (:file "factorial" :depends-on ("packages"))
-   (:file "fib" :depends-on ("packages"))
-   (:file "square" :depends-on ("packages"))
-   (:file "sqrt" :depends-on ("packages" "abs" "average" "square"))))
diff --git a/sqrt.lisp b/sqrt.lisp
index 1493c66..bda6382 100644
--- a/sqrt.lisp
+++ b/sqrt.lisp
@@ -10,4 +10,3 @@
         guess
         (my-sqrt-iter (my-improve guess))))
   (my-sqrt-iter 1.0))
-