Effective management of the sources of new prod uct development(NPD)is crueial for improvement of companies product innovation abilities．In the paper，the high—tech companies in the Zhong Guancurt district of Beijing are selected for case studies．Through visiting，talking with the managers and questionnaire investigations，the authors investigated 37 high—tec h com panies and 1 foreign company on NPD and acquired much first—hand data．Based on these cases，the source of ideas for NPD have been analyzed and summarized comprehensively．At last，some concrete suggestious about how to improve the ablities for management innovation ideas have been put forward to serve as refrerences for the Chinese high—tech comparties in the future．