Innovation is the key for an organization to achieve sustainable development. Open innovation, which emphasizes the integration of internal and external resources in an organization, has brought about a new perspective in technological developments. In order to promote and ensure the performance of the open innovation, an assessment framework and evaluation indicators are required. This study extracted dimensions from the literature and developed performance indicators by compiling opinions from both academic researchers and business experts. The study then flowed into an analytic hierarchy process (AHP) for data analysis. The systematic level included technology execution, technology exploitation and technology exploration, and among all the sub-dimensions for open innovation performance, employee involvement was the most significant. This study identified three significant indicators that are suggested by academic and business experts: the percentage of successful cross-departmental staff participation in new product development, the degree of incentive/reward system implementation for innovation, and the degree of innovation sharing among employees.