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Anaerobic digestion (AD) technology offers a solution by breaking down chicken manure (CM) to produce biogas, which contain methane that can be used as renewable energy. This study aims to explore an innovative and sustainable approach to transfer CM into biogas, a clean and renewable energy source. The study focused on CM physical characteristics and the effects of acid pre-treatement and pH on biogas recovery through AD process. The results shows TS and VS value were 34.39% and 70.14%, respectively. The value indicate that CM is suitable for AD process for biogas recovery. The optimization of acid concentration (1%, 3% and 5%) and pH (6.5, 7.0, 7.5 and 8.0) show that 5% of acid recovers the highest biogas recovery with 23,133.0 mL at 5 day of AD.  While pH 7.5 recovers the highest recovery with a value 83,650.0 mL at 5 days of AD. The amount of biogas was measured using water displacement technique method, and the data was recorded daily. The results shows taht CM has a high potential for producing biogas, which can be converted into renewable energy in the form of methane gas. This research highlight two key benefits of using CM, which are reducing greenhouse gas emission and providing a sustainable energy source for Sabah, Malaysia. This findings will conytributed to a cleaner environment , sustainable energy solutions, and economic benefits fro poultry farmers.