Abstract: HEPS (High Energy Photon Source) is a 4th-generation ring-based light source with a beam energy of 6 GeV and a beam current intensity of 200 mA, and an emittance of 34.2 pm.rad. The HEPS accelerator consists of a linac, a booster, a storage ring, and three transport lines connecting the above three parts. The storage ring is the core part of HEPS. The vacuum system consists of 48 cells, each of which is divided into an arc section and a straight section. The vacuum chambers are processed and manufactured from three materials: CuCrZr (C18150), stainless steel (SS316LN), and nickel alloy (Inconel625), with an inner diameter of 22 mm. There are a total of 24 types of vacuum chamber in a single arc section. Among them, 20 types are made of CuCrZr, 4 types are made of stainless steel, and Flange is processed with nickel alloy. In this paper, the design and development process of the vacuum chambers in the storage ring arc section is introduced, focusing on key technical challenges and innovative solutions. The HEPS storage ring vacuum system is the first in the world to widely use CuCrZr alloy extrusion molding to process the vacuum chambers, and the inner wall of the vacuum chambers is coated with NEG film, which is used to solve the problems of large synchrotron radiation power in the vacuum chambers and limited flow conductivity of the vacuum chambers. In June 2022, we conducted an installation test of the vacuum system for a single arc section. The formal installation of the entire storage ring was started in November 2023 and was completed in July 2024. After segmented online baking of the vacuum system and activation of the NEG coating, the average static vacuum reached 5×10⁻⁸ pa, which was better than the design index.