In this paper we take a general OSARP inspection as an example to explain the method of inspection of an OSARP. We relate the adjustable quantities of each adjustable assembly of the OSARP (Optical Systhetic Aperture Radar Processor) with each characteristic number of a SAR (Synthetic Aperture Radar) data film. The applicable range of the OSARP is obtained by testing the adjustable quantities. The imaging quality of the OSARP is inspected with the general testing targets and a shift lens. The advanced inspection of the OSABP is done wilii the simulated SAR daia films. It is a different way, but "the results are tiie same as tiie former, Finally, the ture SAR data film is processed to whow the oomprehensive imaging quality of the SAR and the OSAEP. Tite expearimentel pictures.and data presented in this paper are for reference only. The experimental results show that the method is applicable.