Objective To solve the problem of the peak hours queuing congestion and the long correct time when the price was not consistent with the tag which were prevalent in the supermarket checkout system, a self-service shopping settlement system was provided in this paper. Methods The commodity barcode was recognized after being input by camera though scanning to obtain the corresponding information such as price, inventory and weight. In combination, the pressure sensor was used to obtain weight information which was compared to the scanned weight of the goods to test consistency and the "wrong weight" would be indicated if inconsistency was revealed. Results Using the low cost pressure sensor for the goods with weight of more than 15 g in the supermarket, the method of matching the bar code with the weight could further improve the effectiveness and accuracy of the commodity information. Conclusion The user-friendly interactive interface was convenient for customer to check the unit price and total value of the goods in a timely manner. Without scanning the codes again at the cashier's desk, the payment could be accomplished in a manner that saved time and manpower cost. The system could conveniently and flexibly implement the connection with supermarket central database by LabVIEW, which provides a good technical support for no waiting of data update.