This article delves into the pivotal application of FFU (Fan Filter Unit) in semiconductor cleanrooms. The FFU ensures an ultra-clean environment for production by leveraging its high-efficiency filtration capabilities, maintaining consistent air cleanliness through uniform airflow distribution. Its low noise operation and energy efficiency align with industry standards, while its flexible installation and maintenance further enhance usability. Additionally, the integration of intelligent control technology underscores FFU's potential in enhancing cleanliness and operational efficiency. This article comprehensively examines the significant role and technological strengths of FFU in semiconductor manufacturing.