1. A commodity order system comprising: a user terminal connected to a network; a commodity selling office site connected to the network and comprising a commodity selling office server; and an electronic check managing site connected to the network and comprising an electronic check managing server and an account information database for accumulating information including account information of a user who uses the user terminal; wherein the user terminal comprising: a device for having an access to the commodity selling office site via the network and obtaining the information including a charge of a commodity desired by the user; a device for transmitting check issuing demanding information to the electronic check managing server via the network to demand the electronic check managing server to issue the electronic check data corresponding to the obtained charge of the commodity; and a commodity ordering device for transmitting the electronic check data transmitted from the electronic check managing server, and commodity ordering information for ordering a commodity corresponding to the electronic check data to the commodity selling office server site via the network; the electronic check managing server comprising: a credit judging device for checking the credit of the user who uses the user terminal by referring to the account information database when the electronic check managing server receives the check issuing demanding information transmitted from the user terminal; and a check data transmitting device for creating the electronic check data, of which issuing is demanded, when the credit judging device judges that there is no problem with respect to the credit of the user, and transmitting the electronic check data to the user terminal via the network; the commodity selling office server comprising: a commodity distribution information transmitting device for transmitting the information indicating that the ordered commodity will be distributed to the user terminal via the network in the case that the distribution information transmitting device receives the electronic check data and the commodity order information transmitted from the user terminal.