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at the same time, UML modeling capabilities provide all the process of software development. 1. Portal. UML Unified Modeling Practical Guide. Qinghua University Press (2021) 2. Pool, X.: UML activity diagram based on the model test case design. Modern Computer 13(32) (2021) 3. Fan, X.: Detailed UML Modeling Example. Qinghua University Press, Beijing (2021) 4. Burns, ., Koh, .: Raytheon Electronic Systems. A Comparison of Multilevel Structured Query Language (SQL) Implementations. IEEE Transactions on Software Engineering 6(1) (1996) 5. Nejad, ., Kharazmi, S., Bayati, S.: Improving Admission Control Policies in Database Management Systems, Using Data Mining Techniques. In: International Conference on Computer Science and Software Engineering, vol. 13(66) (2021) 6. HorseWhite. UML[EB/OL] (November 21, 2021), 。s processing power and response time to meet the needs of users of information processing. Chain hotel management system in the daily treatment response rate of 1 second grade, so it can be timely feedback. During the time of statistical and analysis and query, According to the different amount of data required, the different of second grade to the minute level. Principle is to ensure that operators will not affect the speed of efficiency. In the process of developing “Chain Hotel management system”, expandability should be taken into consideration. For example, with the change in the way of management system, users’ demand for inquiry will 17 also be continuously updated and pleted. All of these request the system to provide sufficient ways in adjusting and expanding the function [4]. This should be realized through the openness of the system. That is, system should be open as well as be able to increase and decrease system module simply and deploy system hardware on the premise of plying with certain standard. Through fixing and replacing the software, the promotion and update of system is pleted. The system assures its easiness in application and maintenance. The Users “Chain Hotel management system” directly deals with are not puter professionals, which calls for the system to provide favorable customer interface and friendly humanputer interaction interface. To realize this, it requires the system to use technical terms that are familiar to users and interface of Chinese information as much as possible. To aim at possible handling problems users may e across, sufficient online help should be provided, shortening the process of the users’ familiarization with the system [5]. Fig. 7. Scheduled activity diagram a) Login screen: When startup program, the login screen will be shown, it is used for user login. b) Tray icon: the program starts only in the Windows tray icon to display a program. c) The main interface: the major chain hotel management system user interface. d) Booking management interface, hotel management interface, payment management interface, customer management interface: Click to access all the interfaces were. 18 5 Operational Requirements User Interface Spreading between different interfaces can also be expressed in UML models, but in the UML specification and graphical representation do not have specific diagram to express, and can be represent