For the past years, the energy overconsumption problems, arising from the rapid growth of Internet scale and services types, are becoming more and more serious. In this context, the Information and Communication Technology (ICT) sector has given an extensive concern to the research on green networking. From an energy-saving point of view for Internet, this paper designs a power consumption model and a QoS model for unicast. Furthermore, this paper proposes a unicast routing algorithm based on Chandy-Misra algorithm and Q-learning algorithm for green Internet, which is compared with an ant colony algorithm based self-adaptive energy saving routing with respect to power consumption, the success rate of routing and running time. Results show the intelligent unicast routing algorithm proposed can effectively reduce network energy consumption, while guaranteeing the good performance.