An apparatus for visualizing game packet data, includes a packet capturing unit for capturing game packet data transmitted and received during a game service; a decryption unit for decrypting the captured game packet data; and a packet filtering unit for extracting packet data having a valid protocol ID from the game packet data and extracting visualization data from the extracted packet data. Further, the apparatus for visualizing game packet data includes a virtual map creation unit for creating a virtual map using the extracted visualization data; and a visualization unit for displaying the visualization data in the created virtual map.