With the developing of the software and network environment, software becomes more and more complex. The network attacks which exploit the software vulnerability make the traditional software testing face a crucible challenge. According to the report by the CSI/FBI, the lose cause from Denial-of-Service remains in top 5 highest rank of network attacks in the past 3 years. Besides the network bandwidth consuming, the commonest attack is to exploit the software vulnerabilities. In my research, I found the traditional testing technique could not find the software vulnerabilities efficiently for they just verify the correctness of software. This way of thinking would bypass many software vulnerabilities which do not belong to the logical error such as memory leak. In another way, some test techniques to solve the resource usage vulnerability were proposed in recent years but the results of them are very primitive. Thus, I try to give the software testing a new definition from the resource usage analysis. I propose 3 test criteria in this paper. Testers could combine these test criteria with existing tools as a guide to test the resource usage of the program. With these test criteria, testers can find out the unhealthy usage of software resource.