CMMI (Capability Maturity Model Integration that is) is a process improvement model. It provides a low-to-high from the fuzzy process, the process can be repeated, the process can be defined, quantifiable process, step by step process of continuous improvement and improved methods models. CMMI but only tells us what to do, but did not tell us what to do, for promoting the implementation of the terms still need an understanding and localization process, it must be universal principles CMMI organization with the specific realities combine to produce a for organizational process improvement methods. Therefore, for the imminent implementation of CMMI businesses, due to the different circumstances of each company's base, the need to improve the focus is different, so, choose the same level, the same consulting firm business improvement process is not the same focus, process improvement progress is not the same. We each company is about to implement CMMI, should find the best practices for their own business processes.