文章提出一种在网络环境下充分利用节点机计算能力的网络计算体系，该体系由应用任务请求分配器、节点机、分布式应用服务器、数据库服务器等组成。文章定义了该体系各个组成部分的功能，给出了具体的实现框架，设计并实现了高效的请求分配算法LATI。文章给出了这种网络计算体系的应用实例，经过测试和比较，证明此计算结构实现简单，具有良好的实用性、高效性和可扩展性。 This paper presents a network computing system that makes full use of the computing power of the node machine in the network environment. The system consists of application task request allocator, node machine, distributed application server and database server. The article defines the functions of each component of the system, gives a concrete implementation framework, and designs and implements an efficient request allocation algorithm LATI. The article gives an application example of this network computing system. After testing and comparing, it is proved that the computing structure is simple to implement and has good practicability, high efficiency and scalability.