The invention discloses a gas or liquid electricity integrated rapid connection device for large currents and a method thereof. The gas or liquid electricity integrated rapid connection device is characterized in that the device is interconnected through special-shaped copper bars, a cooling medium circulating channel is formed in each copper bar, and the cooling mediums comprise gas or liquid; one side of a quick joint is fixed at a designated position and a baffle is arranged during connection, and the other side moves along a guide rail along with a hydraulic system or a pneumatic system; when moving in place, the cooling medium channel is firstly connected, and then under the constraint of the the guide rail, the baffle and a slide bar mechanism, and the copper bars are tightly pressedto complete connection; and when the device needs to be disconnected, a pressure device is released. According to the gas or liquid electricity integrated rapid connection device for the large currents and the method thereof, the connection of the cooling channel and the large-current conductive copper bars can be completed simultaneously and quickly; due to the reasonable design of a sliding mechanism, the copper bars can move along the guide rail, and after the copper bars are in contact, the copper bars are pressed tightly through the pressure action, and therefore the electric conductionperformance of the copper bars is improved; and a hydraulic driving or a pneumatic driving is adopted, automatic control can be realized conveniently, and the device can be applied to occasions with severe environments or high degree of automation.