This is an important means to support the sustainable development for government to implement services out-sourcing of e-government. Based on the analysis of the status quo about the procuratorate's information system, combined with the procuratorate's information characteristics currently and three operation maintainance methods, the article focuses on the construction of services out-sourcing management system about procuratorate's information system, and points out that services out-sourcing is the appropriate choice for procuratorate's information construction at present.