diff --git a/README.md b/README.md
index 6efbf0a..2d7b33c 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ cargo run --features=build-bin -- --irviz fibonacci.png examples/c/fibonacci.c
 cargo run --features=build-bin --release -- examples/c/fibonacci.c  # compile with release build
 ```
 
-You need to install `graphviz` package for IR visualization. (`--irviz`)
+For more information, please refer to the [KECC User's Manual](bin/README.md).
 
 
 ## Test
diff --git a/bin/README.md b/bin/README.md
new file mode 100644
index 0000000..cafbd76
--- /dev/null
+++ b/bin/README.md
@@ -0,0 +1,162 @@
+# KECC User's Manual
+
+## Usage
+
+```sh
+cargo run --features=build-bin -- [OPTIONS] <INPUT>
+```
+
+## Command Line Options
+
+**Stage Selection Options**
+
+- `-p`, `--print`
+
+  Run the C AST printer, print the generated C AST from the input C file.
+
+- `-i`, `--irgen`
+
+  Run the IRgen, print the generated IR from the input C file.
+
+- **no** stage selection option
+
+  If no stage selection option is specified, print the generated Assembly from the input C or IR file.
+
+**IR Optimization Options**
+
+- `-O`
+
+  Enable all optimizations (simpilfy-cfg, mem2reg, gvn, deadcode) supported in KECC.
+
+- `--simplify-cfg`
+
+  Perform simplify-cfg.
+
+- `--mem2reg`
+
+  Perform mem2reg.
+
+- `--gvn`
+
+  Perform global value numbering.
+
+- `--deadcode`
+
+  Perform deadcode elimination.
+
+**Driver Options**
+
+- `-h`, `--help`
+
+  Display available options.
+
+- `-o`, `--output` \<FILE>
+
+  Write output to \<FILE>.
+
+- `--parse`
+
+  Parse the input C file. If parse failed, it returns the error message.
+
+- `--iroutput`
+
+  Print the output IR.
+
+- `--irparse`
+
+  Parse the input IR file. If parse failed, it returns the error message.
+
+- `--irprint`
+
+  Print the input IR AST.
+
+- `--irrun`
+
+  Execute the input IR file and print the return value.
+
+- `--irviz` \<FILE>
+
+  Save visualized IR file to \<FILE>.  `graphviz` package need to be installed.
+
+- `-V`, `--version`
+
+  Print the version information.
+
+## Examples
+
+**Homework 1**
+
+- Print the generated C AST from `examples/c/fibonacci.c`
+
+  ```sh
+  cargo run --features=build-bin -- -p examples/c/fibonacci.c
+  ```
+
+**Homework 2**
+
+- Print the generated IR from `examples/c/fibonacci.c`
+
+  ```sh
+  cargo run --features=build-bin -- -i examples/c/fibonacci.c
+  ```
+
+- Save the IR visualization of generated IR from `examples/c/fibonacci.c` to `fibonacci.png`
+
+  ```sh
+  cargo run --features=build-bin -- --irviz fibonacci.png examples/c/fibonacci.c
+  ```
+
+- Interpret generated IR from `examples/c/fibonacci.c`
+
+  ```sh
+  cargo run --features=build-bin -- --irrun examples/c/fibonacci.c
+  ```
+
+**Homework 3**
+
+- Perform simplify-cfg to `examples/simplify_cfg/const_prop.input.ir` and print the optimized IR
+
+  ```sh
+  cargo run --features=build-bin -- --iroutput --simplify-cfg examples/simplify_cfg/const_prop.input.ir
+  ```
+
+**Homework 4**
+
+- Perform mem2reg to `examples/mem2reg/mem2reg.input.ir` and print the optimized IR
+
+  ```sh
+  cargo run --features=build-bin -- --iroutput --mem2reg examples/mem2reg/mem2reg.input.ir
+  ```
+
+**Homework 5**
+
+- Perform global value numbering to `examples/gvn/gvn.input.ir` and print the optimized IR
+
+  ```sh
+  cargo run --features=build-bin -- --iroutput --gvn examples/gvn/gvn.input.ir
+  ```
+
+**Homework 6**
+
+- Perform deadcode elimination to `examples/deadcode/deadcode.input.ir` and print the optimized IR
+
+  ```sh
+  cargo run --features=build-bin -- --iroutput --deadcode examples/deadcode/deadcode.input.ir
+  ```
+
+**Homework 7**
+
+- Print the generated Assembly from `examples/c/fibonacci.c` and `examples/ir0/fibonacci.ir`
+
+  ```sh
+  cargo run --features=build-bin -- examples/c/fibonacci.c    # Generate Assembly from `examples/c/fibonacci.c`
+  cargo run --features=build-bin -- examples/ir0/fibonacci.ir # Generate Assembly from `examples/ir0/fibonacci.ir`
+  ```
+
+- Print the generated Assembly from `examples/c/fibonacci.c` and `examples/ir0/fibonacci.ir` with all IR optimizations enabled
+
+  ```sh
+  cargo run --features=build-bin -- -O examples/c/fibonacci.c     # Generate Assembly from `examples/c/fibonacci.c`
+  cargo run --features=build-bin -- -O examples/ir0/fibonacci.ir  # Generate Assembly from `examples/ir0/fibonacci.ir`
+  ```
+