The article discussed the legal effect related issues while paper archives migrate electronic records in view of the ISO definition. Actually the process of paper archives migrating to electronic records is a kind of copy behavior. What kind of electronic records which are produced under what kind of copy behavior have legal effect depends on whether the process is made following the rules of relevant laws and regulations. Every process flow is a critical factor. The difference between electronic records and electronic documents, copy and backup and duplicate were also mentioned. At last, some suggestions were proposed for archivist' reference.