Edge detection from image is an important study focus now a days. Particularly in medical image analysis and processing purpose exact detection will give meaningful information. The solid zones of the image with solid contrasts can be detected by edge detection technique. Edge detection technique is a high pass channel for detecting edge which focus in the image picture. For biometric application finger image authentication and identification is very essential. Edge detection technique is very applicable for abrupt change in intensity value of a picture image. For an image corners, curves and lines are important and can be extracted by edge detection technique. Basically, brings down the volume and significant require information of an image, edge detection plays a significant role in image analysis. In this paper we have discussed different edge detection technique and analysed its importance. Also, simulation carried on simple images and results are presented.