This paper is to analyze the research and development of ecosystem models by literature review. It included to the revolution of ecological energetics combined with ecology and thermodynamics, describing the modification of energy flow and transfer in the ecosystem, through the ecological exergy analysis, and exergy estimation of different types. It also explained the meaning of the combination with ecological energetics and information theory. We especially discussed the meaning of understanding the change of structure and function in the ecosystem by the six systematic level information indices. They were total system throughput, average mutual information, system uncertainty, system ascendancy, development capacity and system overhead, which were used to quantify the successional process. This paper provided the reference for the researcher who interested in the analyses of ecosystem models.