In order to realize rapid development of economy, west area needs a lot of capital investment. But in west area, nongovernmental capital is limited and is hard to be accumulated and amassed. Thus, advanced ideas, technology and system must be brought into the west area from outside to cultivate local capital, to let civilians obtain profit, to let leaders not strive for gain from civilians, to enlarge economic surplus space of micro main body (including residents) and to form good social political economic environment so as to develop and promote private economy. In order to cultivate economic environment which is suitable for private economy to develop and to improve competence of micro main body, system and financial assistance from central government is especially important in current development predicament of west area. All assistance, such as policy assistance and institution innovation, effective supply of infrastructure and financial transfer payment and equal public service, should meet the demand of west social and economic sustainable development and effective supply of public goods.