A waterproof mobile intelligent terminal, wherein a housing of the mobile intelligent terminal is provided with a waterproof structure, to prevent water from causing damage to an electronic device inside the mobile intelligent terminal when the mobile intelligent terminal falls into water, the waterproof structure comprises a waterproof external information interface; wherein the external information interface comprises a light transmissive sheet of the housing and an optical-to-electrical conversion module disposed inside the housing, wherein the light transmissive sheet is arranged to provide an optical path through the housing to allow an optical signal to enter the housing through the light transmissive sheet and to reach the optical-to-electrical conversion module disposed inside the housing; wherein the optical-to-electrical conversion module is configured to convert the optical signal that is adapted to pass through the light transmissive sheet into an electric signal; wherein the housing of the mobile intelligent terminal is further provided with a fixing structure, and the fixing structure is configured to fix a charger, and enable an optical transmission interface of the charger to be coupled to the external information interface; wherein the fixing structure is a magnetic module (510, 520), the magnetic module (510, 520) comprises a magnet module configured to provide an electromagnetic attraction force, and the magnetic module is configured to fix the mobile intelligent terminal and the charger by using the electromagnetic attraction force; and wherein the mobile intelligent terminal further comprises a control module disposed inside the housing, and the control module is configured to control the electromagnetic attraction force of the magnet module. wherein the external information interface comprises a light transmissive sheet of the housing and an optical-to-electrical conversion module disposed inside the housing, wherein the light transmissive sheet is arranged to provide an optical path through the housing to allow an optical signal to enter the housing through the light transmissive sheet and to reach the optical-to-electrical conversion module disposed inside the housing; wherein the optical-to-electrical conversion module is configured to convert the optical signal that is adapted to pass through the light transmissive sheet into an electric signal; wherein the housing of the mobile intelligent terminal is further provided with a fixing structure, and the fixing structure is configured to fix a charger, and enable an optical transmission interface of the charger to be coupled to the external information interface; wherein the fixing structure is a magnetic module (510, 520), the magnetic module (510, 520) comprises a magnet module configured to provide an electromagnetic attraction force, and the magnetic module is configured to fix the mobile intelligent terminal and the charger by using the electromagnetic attraction force; and wherein the mobile intelligent terminal further comprises a control module disposed inside the housing, and the control module is configured to control the electromagnetic attraction force of the magnet module.