The invention provides an information processing method and an information processing device. The method is applied to first electronic equipment, the first electronic equipment is internally provided with at least one multimedia port, and the multimedia port has signal input and output functions. The method comprises the following steps of detecting second electronic equipment connected to the multimedia port; sending a first message to the second electronic equipment through the multimedia port; monitoring whether a response message which is sent by the second electronic equipment and aims at the first message is received; when the response message sent by the second electronic equipment is monitored, setting a working mode of the first electronic equipment as a multimedia display mode; when the response message sent by the second electronic equipment is not monitored, setting the working mode of the first electronic equipment as a multimedia output mode. According to the method, the area occupied by the arrangement of the multimedia port in the electronic equipment can be decreased, and the complexity of a multimedia data input or output process is reduced.