Aiming at the problem of weak ability of data collection, management and analysis in the in-service assessment of space-based information support equipment, the construction requirements of data collection and management platform in the in-service assessment are analyzed. By sorting out the classification and characteristics of equipment in-service assessment data, the current situation of in-service assessment data acquisition and management is analyzed. Combined with the current test data management platform construction experience and big data technology, the platform architecture is designed, and the key technologies of the platform are analyzed. The results show that the research is helpful to improve the in-service assessment data management and application ability of the test and appraisal department, to transform the data advantage into decision-making advantage, and to continuously promote the development of equipment construction.