As International Chinese Language Education (ICLE) transitions from scale expansion to quality enhancement, establishing a systematic quality monitoring mechanism has become a critical research issue in the field. Taking Guangxi’s ICLE quality-monitoring practices as a case study, this paper analyzes the construction and operation of a provincial-level ICLE quality-monitoring mechanism from three dimensions: structure, implementation, and support. The Guangxi ICLE quality-monitoring mechanism features an indicator system built upon the survey framework developed by the Center for Language Education and Cooperation (CLEC) of the Ministry of Education, an organizational structure defined by “four-tier subjects and four-tier coordination,” an implementation process anchored in an annual fixed monitoring window, and an “embedded” personnel support model. At the operational level, data collection has achieved institutionalized operation, whereas quality early-warning and result-application components remain in their infancy. At the support level, institutional arrangements are relatively well-established, yet personnel, funding, and technical support still need to be strengthened. The construction logic and operational characteristics of this provincial-level ICLE quality-monitoring mechanism can offer references for theoretical discussions and practical innovations within this research domain.