The present invention relates to a water circulation structure using wave energy in a step of supplying and discharging seawater differently from a conventional aquafarm, wherein an aquafarm is operated to culture marine organisms by storing seawater. Seawater used in the aquafarm is more effectively and stably used, and a power generator using the potential energy of water obtained during a seawater circulation step is operated, so that electric energy is generated to be utilized in various fields. The water circulation structure comprises: a pillar-shaped fixing rod fixed and installed on the bed under the sea to vertically stand； a lever member coupled with the fixing rod to upwardly and downwardly move； a floating body connected with the lever member to be floated on the seawater surface； a piston coupled with the lever member and moved by means of the upward and downward movement of the floating body； a cylinder having a top enabling the piston penetrated therethrough to upwardly and downwardly move, a bottom feeding hole submerged in seawater to feed seawater, and an internal discharging hole circulating seawater； a water tank installed higher than the seawater surface to be provided with seawater and culture marine organisms； a seawater supplying pipe connected with the internal discharging hole of the cylinder to supply fed seawater to the water tank； a seawater discharging pipe downwardly formed to make seawater discharged from the water tank downwardly fall； a power generator installed at the bottom of the seawater discharging pipe to generate electric energy by receiving seawater passing and falling from the seawater discharging pipe； and a capacitor storing and transmitting electric energy generated from the power generator.본 발명은 해수를 저장해 해양생물 등을 양식하는 양식장을 운용함에 있어서 해수의 공급에서부터 배출까지의 과정을 기존의 양식장과는 차별적으로 파력 에너지를 이용하여 물을 순환시키는 구조를 적용함으로써, 양식장에서 사용되는 해수를 보다 효율적이고 안정적으로 운용함과 동시에 해수의 순환과정에서 얻을 수 있는 물의 위치에너지를 이용하는 발전기를 구동하여 전기에너지를 생산해 이를 다양한 분야에 활용 가능하도록 하는 등의 파력
