Device and method for integrated management of rent out washing machines, for effective integrated management of rent out washing machines, in which the washing machines rent out to a particular place, such as dormitory, are managed of details of use for each user, and state information for each rent out washing machine by using a communication terminal (PC) or a managing server far from the washing machines. According to this, the central integrated management of the rent out washing machines by means of PC or server, not only resolves the inconvenience and difficulty in purchase, installation, and movement of the washing machine in a position of the users, but also enables to use washing machines of new models anytime. Moreover, a variety of requirements of the consumer can be met in a position of person in the business (manager), and in turn the person can enjoy increase of income.