As a powerful carrier for optimizing the energy structure, the Integrated Energy System (IES) has received extensive attention and research. The development of public test cases for integrated energy systems has an important impact on the development of energy systems, for which the team has built a flexible and scalable comprehensive energy simulation test system IES-134. The IES-134 system is a simulation test case for the design of regional information energy systems, covering four types of energy: electricity, gas, heat and cold. The system consists of 134 energy nodes, of which 58 are load nodes. In the construction process, the IES-134 system follows the basic principles of primitiveness, standardization, availability, complexity, flexibility, etc., takes multi-energy deep coupling as the core, adopts standardized architecture design, embeds communication network, integrates a high proportion of renewable energy access scenarios, realizes the integrated design of "source-grid-load-storage", provides complete structural parameters and multi-scenario time series datasets, and can meet diverse research and testing needs. The IES-134 system has the characteristics of large system scale, deep coupling degree and complete data resources, and the construction of IES-134 system aims to provide a benchmark platform for information energy system research.