Seismic isolation devices that are connected to the top of the ceiling slab; Connecting plate provided on the upper end of the installed apparatus; And one end is coupled to the lower end of the seismic isolation device, the other end wire sling coupled to the connection plate; the seismic isolation device, and including, the spring and the points forming the damper to be parallel connected to the spring; and a, the 1 L-shaped member forming a is, the upper and the lower side of said connecting plate; The 2 L-shaped member, which is installed across the first 1 L-shaped member; And the second doedoe installed across the L-shaped member with two L-shaped members that vertical plane is the 3 L-shaped member that is installed so close to each other; is disclosed the anti-tip device comprising the said anti-tip device .; And active protection device which is provided in the downward direction of the apparatus; including, prevent the active device, a top plate for supporting the equipment is installed in the removed position, one end gakgwan with a top portion is cut; One end being connected to said equipment, connected to the other end bracket is connected to the other end of the gakgwan; Is provided across said one end of the lower side of the gakgwan, the horizontal plane is ㄱhyeong member coupled to the vertical plane gakgwan and is connected to the holding rod, which is placed on the floor slab; The vertical plane is connected to the holding rod and the horizontal plane is a holding rod of L-shape which is connected to the floor slab anchor bracket; And a support member which is directly adjacent to the top plate that were not removed doedoe installed above the gakgwan; the composite seismic structural system comprising the is disclosed.