Wave energy has a huge potential compared to other renewable energy resources. The energy of sea wave can be converted into other forms of energy like electrical energy using a Buoy wave energy converter. The converted power is collected by a Power take off device. This paper aimed to model a wave energy converter (WEC) and analyze its potential. It's mainly focus is on the construction and operation of point absorber buoy type wave energy converter and the responses of the converter when sea wave appears on it. The simulation is done in MATLAM/Simulink.