At present, the rural distribution includes Dispersed Type (DT) and Residential type (RT). In this paper, the structure system of investment management with global optimization was suggested to resolve drawbacks caused by conventional-style biogas investment management mode. The Investment Management with Global Optimization consists of four modules: examination content optimization (ECO), follow-up service content optimizing (FSCO), start optimizing (SO), consolidate optimization (CO). Four modules work coordinately to promote household biogas will be Efficient, sustainable and stable development. Finally, an example is described in detail to show the organizational structure of global optimization and its operation modes.