Password setting method, password verification method, device and system using methods

The invention provides a password setting method, a password verification method, a device and a system using the methods. The password setting method comprises the steps that inputted password characters and the input time of each password character are recorded by terminal equipment; the password characters and the input time of each password character are transmitted to a server; the server determines password characters used for setting the password and determines the password input interval mode used for setting the password according to the input time interval of every two password characters.