With the development of wind industry, influencing factors for economic operation of wind farm is attracting more and more attention. The internal and external factors during wind farm's life cycle are discussed. For external factors, wind electricity price, taxes, repayment load, tempo of wind power industry are analyzed; as to internal factors, evaluation of wind resource, site selection, feasibility study, project bidding, project design of wind farm, design and manufacture of wind power equipments, construction, operation and maintenance of wind farm are analyzed in this paper. According to the analysis, we can obtain the conclusion: the external factor, i.e. wind electricity price, taxes, repayment load, tempo of wind industry leave little selection room for wind power enterprise, as to internal factors, wind resource is the precondition, design and manufacture of wind power equipments, design and construction of wind farm are the pledge, operation and maintenance is the last stage but not the least important stage to achieve economic benefit.
