E-commerce estate using computer network relates to real estate is a member when the broker in particular by evaluating pre is buyer for to selling having prior knowledge and the mobile station can participate in a bidding, escrow drawing, reliable introduced evenness through the [...] title that is capable of making transaction estate appraisal and brokerage service device and method relates to. The present invention according to the selling method estate appraisal and brokerage service may evaluated to seller' s computer placed with and decides the grade article. For evaluation of member store class article, which ranked based on electronic estimating, buyer is references. A plurality of seller' s computer the buyer and subject to bid, during a predetermined period, among the received bidding of the outer periphery is auctioned to the Bidder with. Auction intermediating information from the network of affiliated branch procedure and ownership transfer according to received information in the database (Title Company) drawing, escrow (Escrow) using the agency is. Estate appraisal and brokerage service device and method the present invention according to an online real estate over analysis information reliability of real estate transaction through the disclosure, rapidity, an enhanced, moving, interior, scrivener, insurance, financial such as in connection with service real estate transaction is processed on-line by the trading provided integrally related service associated procedure. detecting sensor is disposed on an opposite transaction anti-charging material, and carbonblack.