1. A game grammar-based packet capture and analysis apparatus for conducting game test, comprising: a packet capture unit for capturing packets of game data transmitted and received between a game client and a game server; a packet data storage unit comprising a non-transitory computer readable medium configured to store the packets of game data; a packet analysis unit for analyzing the packets captured by the packet capture unit to generate a game grammar based on analyzed results; and a load generation unit for generating packets in compliance with the game grammar to apply the packets to the game server as a load, wherein the packet analysis unit includes: a packet generation rule analyzer for defining packet generation rules by analyzing an entire structure of the packets; an action analyzer for grouping a series of packets into a group to define the group as an action of a game; a protocol analyzer for analyzing protocols of communication between the game client and the server by analyzing the packets; and a game grammar generator for generating the game grammar using the packet generation rules, the actions and the protocols.
2. The game grammar-based packet capture and analysis apparatus of claim 1 , wherein the packet generation rule analyzer defines the packet generation rules by analyzing a header of each of the packets, a protocol ID and a parameter in the entire structure of the packets.