Two basic models for Enterprise technology innovation, namely independent innovation and imitative innovation models, were analyzed. The results show that: (1) Enterprise's selecting technical innovation is related to IPR protection extent of the country of region that the enterprise located; (2) The enlargement effect of productive elasticity coefficients of technical inputs on the imitation cost confirms enterprise's choice; and (3) The monopoly position of those enterprises with advance technology may be changed with relative IPR protection extent and labor inputs. Enterprises will have different choice under different circumstances. 