[Problem] to provide a real estate transaction support system for supporting real estate. [Solution] the property information storage unit, the property information display processing part, processing the information and messages between message to the owner of the buyer, message information to the translation processing section executes the translation processing, the message information storage section. The information is a message, the message information satisfying a predetermined condition is determined, determines when a predetermined condition is satisfied, the computer displays the message information is stored in the approved as a counterpart. The translation processing section, the predetermined message information in the language translation, the message information area, information indicating if the distance, expressed in units corresponding language, translating the message information is stored as. The property information display section, the display request based on a user property information of language, the language information corresponding to the message. Figure 1 [drawing]