The purpose of the present invention is to provide a portable terminal and an application software start-up system whereby the application software that is started up is limited depending on the state of a user, thereby providing an improved ease of use. For this purpose, an application software start-up method for an information processing device comprises: performing identity authentication based on static biological information; determining the state of the user by comparing dynamic biological information acquired from the body of the user with previously measured dynamic biological information; and limiting the application software that is started up in accordance with the determined state of the user and on the basis of a permission level that is set in advance for each application software item.