Abstract: In order to solve problems of long response time and poor user experience of traditional Web attendance system caused by using submit means for data exchange, the paper proposed a scheme of using Ajax technology to design mine attendance system, analyzed principle of Ajax technology, and introduced realization of mine attendance system based on Ajax technology. Ajax technology sends asynchronous request to server by use of XmlHttpEngineRequest object, then gets data from the server, and renews page by operating DOM through JavaScript, so as to avoid situation that users wait for delayed server response caused by submitting form. The application showed that the system has high inquiry efficiency, quick respond speed, correct data statistics and perfect user experience.