The invention relates to an electrical cabinet heat radiating device and an electrical cabinet using the same. The electrical cabinet heat radiating device comprises suction modules which are arranged above at least one equipment installation position inside a cabinet body. Each suction module comprises a support member which is fixed relative to the cabinet body and a wind scooper which is buckled on the support member, the wind scooper is provided with a downward air suction opening and an air blowing opening towards a hot air channel, and the support member is provided with a fan blowing air to the air suction opening. According to the technical scheme, the suction modules arranged above the equipment installation positions can suck out air heated at the corresponding equipment installation positions with the aid of the fans, the air is blown to the hot air channel through the air blowing openings, and the suction modules and the hot air channel work together to actively radiate heat, so that poor heat radiating performance of part of the equipment installation positions inside the electrical cabinet is avoided, and a better heat radiating effect is achieved.