Abstract: Tbe evolution of forest system was a process of self-organization. The impact of human was one of the factors which affected the forest system. Thm’e were three critical indices, i. e., the fractal structure in the dimension of space, the 1/fluctuation in the di~ension of time, and the Zipf law in the dimension of ranking, which could be used to test whether the forest resource system was a self-organized system. According to the data of national forest inventory and furest resource iuventory of Zhejiang province, this paper discusses the three indices. To analyze the fractal structure of space, we divide all the sample plots into 20groups by forest volume. The first group is made up with all the sample plots have volume of O. 5--1. 0m~, and plots with 1. 0--1. 5m3volume make up the second group, and so forth. Then turn the nambers of ever), group into frequency sequence. By studying the relation between volume and frequency, the resuh that the foresl spatial structure obeys power-law and is fractal can be drawn. Next we transform the sequent’e of tlifferent age class vohtme into time series, and find the tiroe series of forest system show l/f fluctuation. The third part, we sort tbe forest volume data of 74unites in Zhejiang province by descending order and get the result that there is Zipf law in the dimension of ranking by analyzing the log-log plot of data. To sum up, forest resource system is inconformity with the three indices. The supposition that forest resource system is a self-organized system can be verified. What’s more, we find that it is feasible to analyze self-orgauization characters by forest inventory data.