本文介绍了作者研制的负载平衡系统ＩＬＢＯＴ（ｉｎｔｅｌｉｇｅｎｔｌｏａｄｂａｌａｎｃｅｒｂａｓｅｄｏｎｏｎ－ｌｉｎｅｔｒａｃｉｎｇ）的作业选择策略，该策略考虑了不同的负载环境对不同类型的作业响应时间的影响，并以此为依据来估算作业转移的收益与开销，将一个基于收益与开销的新的选择策略用在负载平衡算法中．性能测试的结果表明，使用该策略能较好地缩短作业的平均响应时间和提高资源的利用率． This paper introduces the job selection strategy of the load balancing system ILBOT (inteligentloadbalancerbasedonon-linetracing) developed by the author. The strategy considers the impact of different load environments on different types of job response time and uses this as a basis to estimate the profit of job transfer and Overhead, a new selection strategy based on revenue and overhead is used in the load balancing algorithm. The results of the performance test show that using this strategy can shorten the average response time of the job and improve the utilization of resources.