In today's rapidly urbanizing world, the treatment and transportation of urban wastewater have become an indispensable part of urban management. Xi'an, an ancient capital with a rich history, faces the critical issue of wastewater management and environmental protection alongside its rapid development. This article focuses on the theme of "Xi'an Wastewater Transportation - Domestic Wastewater Removal - Industrial Water External Disposal," delving into the role and services played by Hongju Architectural Engineering Consultancy in this field. It also analyzes the necessity, process, and future trends of wastewater treatment.