Based on Job Demand-Resource model, the study builds theoretical framework of ‘information sharing（organizational resource）—occupational skill enhancement（employees’ need satisfaction）—innovative performance（employees’ performance）’. It takes external professional and technical employee as research object, and explores the motivating mechanism of organizational resource on external employees’ innovative performance under non-standard employment background and additionally stresses the key mediating effect of occupational skill enhancement. The empirical test examines that: Client company’s information sharing activity has significant positive impact on external professional and technical employees’ innovative performance; and the relationship between client company’s information sharing and external professional and technical employees’ innovative performance is partially mediated by network ability enhancement. The research conclusions draw attention to external employees’ positive effect on organizational innovation, as well as the importance of management of innovation motivation for this group on the foundation of need characteristics.