| This article begins with the new visual angle of the main economic resources, trying to make another macroscopic research of the history of the human's economic changes. In every economic times, there must have one kind of resource which focus on reflecting the level of productive forces and decides all aspects of economy and their changes. This kind of resource is the key resource. On the base of definition of the key economy resources, this article mainly analyses its' history of changes and finds out that the key resource is physical labor in the Gathering and Hunting-Economy Age, soil in the Agriculture-Economy Age, capital in the Industrial- Economy Age, knowledge in the Knowledge Economy Age. The reasons of these changes are the advance of productive forces, the pulling force of human's requirement and the influences of institutional changes. The changes of the key resources inevitably lead to the changes of industrial structure, product relations, world economy-pattern, institution, and so on.Finally, according to the point of view of this article, the author put forward the proposal that China should try to raise more capital and use it more efficiently, at the same time Chinese have to cultivate their knowledge resource and strive for stepped-up progress. |