The study of wireless sensor network is challenging in that it requires an enormous breadth of knowledge form. They are rapidly growing area for research and commercial deployment. Wireless sensor networks address a broad range of applications related to healthcare, industrial, area, surveillance and environmental monitoring. One of the most active research area in wireless sensor network is that of coverage. This paper presents effective coverage strategy for wireless sensor network. This mainly focus on two coverage strategies which are compared. In this paper, the authors compare Delaunay triangulation and square grid coverage strategy on different parameters.