Steps for developing a Nios II system:

1. Analyzing system requirements
2. Defining and generating Nios II system hardware in SOPC
Builder
3. Integrating the SOPC Builder system into a Quartus II project
4. Compiling the Quartus II project & verifying timing
5. Download the FPGA configuration file (.sof) to the target board.
6. Creating a new project in the Nios II IDE
7. Compiling the project：Build the project
8. Running the software on the ISS and target hardware：
Right click the project name and choose Run As > Nios II Hardware.
The IDE downloads the program to the FPGA on the target board and starts execution.

大家也可以去看看论坛中的中文链接：

nios 10分钟入门:

http://bbs.eccn.com/ecbbs/dispbbs.asp?boardID=9&ID=33748&page=1