Electronic voting (e-voting) is more economical and efficient than traditional voting, however, it also faces the challenges of privacy and security. Existing e-voting schemes take advantage of homomorphic encryption to solve the privacy and security issues for {0,1} type e-voting applications. Unfortunately, existing schemes cannot meet the requirements in (real number) score-type e-voting applications, e.g., in competitive competitions or satisfaction surveys. This paper focuses on solving the privacy and security issues for score-type e-voting applications based on cryptographic technology. In order to solve such issues, we propose an electronic scoring scheme based on the CKKS(Cheon-Kim-Kim-Song) homomorphic encryption algorithm. It supports floating-point computing for exploiting homomorphic encryption in scoring and evaluating procedures. In addition, the security analysis demonstrates that the proposal achieves data privacy and security protection. Furthermore, we design an electronic scoring experiment based on the CKKS scheme in the library of SEAL. The experimental results indicate that it only takes 0.42 seconds to complete the scoring evaluation for 5000 people. Finally, the comparison results show that the proposal is more efficient, flexible, and practical.