The proportion of waste electrical and electronic equipment (WEEE) within municipal solid waste is increasing globally. Driven by rapid technological advancements and the proliferation of electronic devices, the volume of WEEE is projected to grow significantly in the absence of effective strategies and regulations. To address this challenge, the European Union (EU) implemented the WEEE Directive, aiming to monitor and improve member states' performance in controlling WEEE generation and recycling. Similarly, Hong Kong introduced the Producer Responsibility Scheme (PRS) to regulate WEEE generation, recycling, and landfill disposal. The establishment of WEEE·PARK in the same year further marked Hong Kong's commitment to enhancing its recycling infrastructure. Despite these efforts, the effectiveness of WEEE recycling systems varies across regions. This study evaluates the overall efficiency of WEEE recycling flows in the EU using a system dynamics model, with a detailed focus on Sweden and Denmark as case studies. The analysis explores the strengths and limitations of their recycling systems, offering insights into best practices. Additionally, the study examines Hong Kong’s WEEE recycling framework through comparative analysis and system dynamics modeling. Based on the findings, recommendations are proposed to enhance Hong Kong’s WEEE recycling system, drawing on lessons from the EU. This research aims to contribute to the global discourse on sustainable WEEE management by providing actionable insights for policymakers and stakeholders.