Disclosed are a zero-knowledge proof and edge computing-based blockchain as a service (BaaS) system and method to improve data privacy vulnerabilities. The data privacy enhancing BaaS system includes an edge node configured to store blockchain data in a blockchain built therein, and a cloud connected to the edge node and configured to provide management of a connection state of the edge node and a cloud service, wherein the blockchain may verify the blockchain data by applying zero-knowledge proof technology.