The author has proposed the situation analysis of double action game with entropy for a long time and has made many preliminary research results. Some achievements have been applied in the field of computer science, robotic sscience and artificial intelligence science. This book (the first volume and the second volume) has improved and perfected the previous work of this author. Based on theory of n-person games with entropy in the first volume, the second volume researches the theory on situation analysis of 2-person and 3-person games with entropy and will give out some examples whose results are realistic and innovative.