Network lifetime maximization is a critical issue in Wireless Sensor Networks (WSNs) since each sensor has a limited power supply. In contrast with conventional sensor networks, video sensor nodes compress the video before transmission. The encoding process demands high power consumption, thus raising a challenge to the maintenance of a long network lifetime. In this chapter, we examine a strategy for maximizing the network lifetime in Wireless Visual Sensor Networks (WVSNs) by jointly optimizing the source rates, the encoding powers and the routing scheme.