To promote the contract of rental property object by allowing a resident to present information related with the rental property object prior to a leaving scheduled date in rental property object transaction using an off premise communication network such as the Internet.

At first, property object information such as the location of a rental property object and leaving schedule information such as the leaving scheduled date of the property object transmitted from a resident related with the property object information are stored in a first storage means 81, and move desire information such as the move desired date of the property object corresponding to the leaving schedule information is received from a person who wants to move in, the move desire information is collated with the leaving schedule information, and when the move desire information is matched with the contents of the leaving schedule information as the result of the collation, the information of move reservation of the property is stored in a second storage means 84 concerning with the person who wants to move in presenting the move desire information.