An apparatus and method for providing big data information based on a subscriber's behavior. The apparatus includes a subscriber behavior information collector configured to collect real-time-subscriber-behavior-information obtained based on packets that a user device transmits and receives in real-time when using an Internet service; an additional subscriber information collector configured to collect subscriber-related information including personal information; an environmental information collector configured to collect environmental information that is information about factors extrinsic to subscriber's behavior; a big data extractor configured to extract real-time subscriber big data using the collected real-time-subscriber-behavior-information, subscriber-related information, and environmental information; and a real-time analyzer configured to generate subscriber's real-time characteristic information associated with the subscriber by analyzing cumulative big data that is generated by accumulating the real-time subscriber big data extracted by the big data extractor.