The embodiment of the invention provides an interface background switching method and a mobile terminal. The interface background switching method comprises the steps that the state change information of the mobile terminal is monitored, wherein the state change information includes at least one of text content information and audio playing information, an interface background corresponding to the state change information is determined according to the state change information of the mobile terminal; an interface background of an application program currently operating of the mobile terminal is switched into an interface background corresponding to the state change information. By the adoption of the scheme, the personalized background switching demand can be met, the usage feeling of a user can be improved, manual operation of the user is not needed, a process is simple and convenient, and the problem that chatting background setting in chatting software in the prior art is complicated is solved.