This white paper describes cloud gaming service experience evaluation, including the requirement background, evaluation model framework, subjective experiment and analysis method, model equation structure, typical model values, and model application scenarios. Huawei X Labs and NetEase Thunder-fire Game Business Division have established a user experience model for cloud gaming based on the observation of player behavior and player feedbacks while playing cloud games on 5G networks. The modeling process complies with ITU specifications and uses hierarchical mapping. This model makes up for a lack of quantitative research on cloud gaming experience in the industry. The cloud gaming experience model provides reference and guidance for 5G network construction and industry development planning.