There has been an rapid development in the field of wireless senor networks(WSN) in the recent years. The development is mainly due to the availability of small size sensor cameras and microphones The advances in micro electromechanical systems have promoted the progress of a powerful class of sensor-based distributed intelligent systems skilled of ubiquitously retrieving multimedia information, namely Wireless Multimedia Sensor Networks (WMSNs).So the WMSN is the current topic of research due to its applications in various fields. In order to improve the channel utilization rate, reduce transmission delay and balance the transmission load in WMSN multipath routing is a promising solution. Multipath routing helps to transfer data concurrently by reducing the delay and congestion in WMSN. In this paper, various protocols and schemes are being discussed on multipath routing strategy which will identify the areas of further development for WMSN.