DNA storage represents an innovative approach to information storage, leveraging the four nucleotide bases (A, G, C, T) to encode data. DNA encoding is a critical step in this process, determining how digital information is converted into DNA sequences and securely stored. This paper analyzes existing encoding methods and proposes a novel approach that demonstrates superior performance in terms,&of encoding density and compression efficiency. Furthermore, given the current diversity of encoding methods, poor system compatibility, and incomplete evaluation frameworks, we introduce a comprehensive performance evaluation standard system for DNA encoding. This work aims to support the advancement of DNA coding technology and the broader DNA storage industry through methodological research and technological system alignment.