Recently, wireless sensor and actor networks (WSANs) have evoked attention because of its extensive application foreground. WSANs include resourceunconstrained nodes, actors, to make decisions and deal with gusty events. As we all know, one of the most important objectives of designing communication schemes for wireless sensor networks (WSNs) is to decrease energy consumption of sensors and prolong networks lifetime. An introduction of powerful actors completely changes the network structure and new protocols at all layers are demanded to adapt to the characteristics of WSANs. In this paper, we will analyze the routing problem of WSANs and explore the routing differences between WSNs and WSANs. Then we will present our novel energy-efficient routing scheme for WSANs which makes use of actors. At last, the scheme will be proved to be feasible and adaptive to WSANs through simulation experiments.