Sunlit Company has established an "Internal Audit Management Procedure," conducting internal audit activities annually. Personnel who have completed internal audit training are assigned to perform cross-departmental audits according to the audit plan. The audit scope includes ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, ISO 46001:2019, ISO 50001:2018, RBA, and ISO 14064-1:2018. The audits are conducted to inspect and assess the implementation of the ISO management systems and the RBA (Responsible Business Alliance) control system. Through annual management review meetings, the company tracks progress and provides timely improvement suggestions. The audits also assess the risks identified in the audit plan or, if necessary, carry out project audits to evaluate the overall effectiveness of the management system.

The Sustainability Office and Energy Resources Promotion Team under the Sustainable Development Committee conduct various projects annually regarding energy, water resources, greenhouse gas inventory, carbon footprint, and energy-saving and carbon-reduction strategies and goals. They also regularly review and plan carbon reduction targets each year.