The principles of sustainable tourism are becoming widely accepted, with the prevailing of sustainable development idea.Ecotourism, considered as a specialty product of achieving sustainable tourism, is also attracting a considerable amount of interests among both tourist researchers and governors.This paper aims at the definitions of sustainable tourism and ecotourism, and expounds the relationship between sustainable tourism and ecotourism, then discusses the way of carrying out the strategies of sustainable tourism and ecotourism.This paper provides an introduction of international standard of appraising sustainable tourism and ecotourism,and gives an overview of development in sustainable tourism and ecotourism in other counties.The author points out though many Chinese academics have been spreading the ideas of sustainable tourism and ecotourism, there are some twists about the concepts of sustainable tourism and ecotourism among the public of China.From a different perspective, the author highlights the actual problems of carrying out sustainable tourism and ecotourism strategies in China.A new concept of tourist threshold for estimating environmental effects is founded in this paper.Based on the situation of tourism in China, the author puts forward the goal and plan of carrying out sustainable tourism and ecotourism.Some kinds of regions are elected to test the effects of the plan.