This application discloses method and device for initiating privacy mode of data processing apparatus, the method includes: setting privacy space as privacy mode to protect corresponding privacy information on the data processing apparatus, setting authentication information corresponding to the privacy space and setting specified interface for inputting the authentication information; Monitoring input information on the data processing apparatus at the specified interface of the data processing apparatus, comparing degree of similarity between the input information and the authentication information corresponding to the privacy space after the input information is detected, and initiating the privacy space in case that the degree of similarity between the input information and the authentication information corresponding to the privacy space is higher than a corresponding threshold. With the embodiments of the present invention, security of privacy information of the user in the data processing apparatus can be increased, and at the same time, operation path of the user is reduced and the user is facilitated to initiate the privacy mode rapidly.