To provide a trading system for a real estate object and equipment in the object.

Personal computers 1-3 provided in a seller side for an area A object or the like, or a purchaser side therein, and a router 5 for transferring a data signal of an object trading-related information bucket relay system-likely are connected to a dedicated line 4. Personal computers 6-8 provided in a seller side for an area B object or the like, or a purchaser side therein, and a router 10 for transferring a data signal of an object trading-related information bucket relay system-likely are connected by a dedicated line 9, to be connected to the area A. Personal computers 11-13 provided in a seller side for an area C object or the like, or a purchaser side therein, and a router 15 for transferring a data signal of an object trading-related information bucket relay system-likely are connected by a dedicated line 14. The routers 5, 10 15 are connected to the dedicated line 4, 9 or 14 in the area A, the area B, or the area C.