n the present paper,the stochastic behaviours of matter and energy flow in econetworks are described by transition probability matrix on the basis of Markov process.The time chain of matter and energy flow is defined as the matter and energy marcodistribution strtucture changing with time in an econetwork.The basic principle of time chain analysis is given for steady and insteady state econetworks.The analysis of two steady state econetworks indi- cates that the time chains directly show the marco-dispasiti...