This paper is about the development of a system that supports excavation surveys by use of a PC. The system consists of two sub-systems: One is the Onsite Support System (OSS). Other is the Excavation Data Shearing System (EDSS). OSS combines a database with a general purpose CAD system. When OSS is used, it is description by excavation site and information can be managed. EDSS combines a WEB server, a database, and a VRML server. When EDSS is used, information of relic can be shared on the Internet and discussed by researchers away from the site. It provides the users with a virtual reality experience of the excavation site. The experimental system has been used as a tool by practical excavation survey of Islam city ruins from the Middle Ages in the Arab Republic of Egypt. In this paper, the framework of the system is introduced. The authors verified the effectiveness of the system by participating in an excavation survey.