A method and a device are provided for inputting account information in the field of Internet communications. The method includes: obtaining user account information included in a first application; obtaining an information type of a form element included in a form of a second application; determining account information corresponding to the form element according to the information type of the form element and the user account information; and automatically inputting the account information corresponding to the form element to the form element. The device includes a processor and a non-transitory storage medium, which includes: a first obtaining module, a second obtaining module, a determining module, and an inputting module.