network problems. It may be a network problem that the selection personnel of the online examination of catering security code can't open it. It is suggested to change the network and open it again. In 2121, Yunnan Provincial Market Supervision Bureau developed and launched the cloud platform of "Food and Beverage Security Code". The end of the platform facing consumers is a simple QR code, which is convenient to enter and use. The effective use of platform integration data will effectively improve the ability of catering service environmental sanitation and food safety supervision.