[Purpose/significance] With the increasing demand for self-check system in domestic libraries, its function and cost are becoming more and more concerned. This article compares and analyzes the functions of Barcode mode, RFID model and Barcode+RFID mode, and provides reference for the purchase of domestic libraries.[Method/process] Based on the full investigation, the functions and characteristics of various models were summarized, and the cost price, borrowing and returning speed and safety of the three models were compared and analyzed.[Result/conclusion] The D self-check system in Barcode mode is cheaper and has better functions than similar products. It is recommended that small and medium-sized libraries in China should give priority to buying Barcode mode when they choose to purchase self-check system.