The utility model discloses a material structure corrosion behavior's rig for testing under full subregion environment of simulated seawater, it includes sea water corrosion test room and host control system, and seawater corrosion analogue test room is equipped with a concrete base, is provided with combination pin -connected panel structure mistress on the base, is provided with the pond in the combination pin -connected panel structure mistress, is provided with the test piece rack in the pond, and the four layers is established altogether to the test piece rack, and from the top down spatters district, water level variation district and distinguishes under water for big gas area, wave in proper order, still be provided with morning and evening tides controlgear, spraying controlgear, temperature controlgear, humidity controlgear, adjustable circulating air supply device, sea water medium automated inspection equipment and lighting apparatus with host control system circuit connection in the rotten laboratory of sea water. The utility model discloses energy -concerving and environment -protective, but the simulated seawater environment including distinguish under water, water level variation district, the unrestrained subregions entirely such as district, big gas area that spatter, realize a plurality of environmental parameter's automatic monitoring and control.