The innovation management maturity model was constructed according to software capability maturity model (CMM). From the innovation research, organization management, mode selection, process system, achievement application, talent mechanism, culture cultivation and so on, the key process areas (KPA) and key activities (KP) were described. The maturity of innovation management is defined as five levels, including disordered level, initial level, basic level, standardizing level and optimizing level, and main characteristics of each level were analyzed. On this basis, the approach to improve the innovation management capability of enterprise was studied deeply. Through the construction of the systematic innovation management mechanism, appropriate choice of innovation mode and cultivation of excellent innovation culture, the innovation management capability and maturity level can be promoted, which can help enterprises to improve the core competitiveness and realize sustainable development.