The "IC Card Attendance Management System" (ICAMS) is a powerful system to record the on duty and off duty of employees. It cooperates with the "Web-base Attendance Management System" (WAMS) to help the personal department to manage the attendance status of employees. This system adopts the contactless IC card and reader for employees to operate. The card can be accessed quickly and convenient with low failure rate. It uploads attendance data to WAMS database, and then these data will be referred when employees ask for travel on business, leaving and overtime working. This article describes the structure, demand, interface and functions of the system.