Aiming at the problem that the in-service test data collection of space-based information equipment has not formed an effective mechanism and method, an in-service test data collection method was proposed. By analyzing the current status of data collection for the in-service test of space-based information equipment, the paper clarifies the types of in-service evaluation data, determines the data collection process, and designs a data fusion method for the collected data. The results show that this method can provide a reference for the collection of space-based information equipment in-service test data.