The invention discloses a cooperation structure of a socket and a plug. The cooperation structure is composed of a socket body and a plug body. The socket body consists of a housing and a base fixed at the bottom of the housing. The plug body includes an outer case. One pair of conductive bases that can be plugged with one pair of conductive pieces in the plug body cooperatively to realize electric connection is installed in the socket body. Besides, through holes through which the conductive pieces can pass are formed in the housing; first recession parts extending outwardly are arranged at the upper parts of the through holes; waterproof rubber sleeves through which the conductive pieces pass are installed in the first recession parts; the upper ends of the waterproof rubber sleeves extend out of the first recession parts; and second recession parts in which the upper ends of the waterproof rubber sleeves are arranged at the lower end surface of the outer case. When the plug body andthe socket body that are plugged mutually are wetted by water, entrance of water into the socket body through the gaps between the conductive pieces and the through holes can be avoided, so that an electric shock accident can be effectively avoided.