An electronic voting system is a system that records, stores, and processes ballot data in the form of digital information based on cryptography. The system requires simple and fast operations, and the voting process should be open, fair, and just. To ensure the fairness and confidentiality of online electronic voting, votes are generally encrypted. To ensure the fairness and confidentiality of online electronic voting, votes are generally encrypted. After integrating the encrypted votes uploaded to the server, the number of votes each candidate receives can be counted. To address limitations of current network electronic voting systems tailored solely for electoral voting, we introduce a hierarchical electronic voting scheme. Leveraging the pseudo-super knapsack problem and its solution, this scheme extends the conventional two-stage electoral voting model to an L-stage framework. The proposed scheme employs an enhanced ElGamal homomorphic encryption algorithm for secure vote encryption. By leveraging its concurrent homomorphic operations for addition and multiplication, the scheme ensures fairness, confidentiality, accuracy, non-repudiation, and verifiability within a hierarchical structure.