电子商务时代，企业的生存空间由物理的市场地域转变为虚拟市场空间。虚拟市场空间以信息为基础，被信息所控制，它改变了消费者必须通过市场地域使用和享受产品、服务的状况，同时弱化了生产者必须通过市场地域获得资源、进行生产的限制。通过信息交互，各种生产、交易活动从依赖物理地域变为依靠市场的虚拟空间进行。伴随这种转变，企业原有的价值创造机制发生了深刻变化，从供应链的管理模式转变成价值网的管理模式。其目的就是为了能够使电子商务环境下的企业快速响应顾客需求，提高企业核心竞争能力。在这种背景下，本文提出通过构建、运行、实施企业价值网来增强企业的竞争能力、实现企业价值的创造和增殖。通过理论分析和实例分析相结合的研究方法，指导企业如何构建价值网，以提高企业在电子商务环境下的竞争能力。

In an e-commerce era, the surviving space for a business has converted from physical market areas to virtual market spaces. Based on and controlled by information, the virtual market space has changed the situation where consumers have to rely on physical market areas to use and enjoy products and services, and has mitigated the limitations of manufacturers having to rely on physical market areas for resources and production. Through information interaction, production and trade can be conducted by means of virtual market spaces rather than physical market areas. The shift will result in a profound change in the original value generating mechanism of a business, namely, a change from the supply-chain-based management model to the value-net-based management model. Against such a background, this essay proposes that a business should enhance its competitiveness, and create and augment its value, through establishing, operating and implementing the business value network. By using a research approach that combines theoretical analysis and case analysis, the essay provides guidance on how to establish the business value network to enhance business competitiveness in the context of e-commerce.