Device, method, and computer program for providing game service

A game service providing apparatus comprising:

• a communication unit configured to receive identification information of a card reader attached to a user terminal from the user terminal, receive, from the user terminal, first card information read from a first card by the card reader as target card information, and receive second card information read from a second card by the card reader as first source card information;
• and
• an account managing unit configured to receive level information of the card reader from a database by using the identification information of the card reader and change a property of the first card by using the second card information and the level information of the card reader,
• wherein the account managing unit changes the property of the first card or sets a property change success rate of the first card differently according to the level information of the card reader.

A game service providing method for providing a game service by a game service providing apparatus, the game service providing method comprising:

• receiving identification information of a card reader attached to a user terminal from the user terminal;
• receiving level information of the card reader from a database by using the identification information of the card reader;
• receiving, from the user terminal, first card information read from a first card by the card reader;
• and
• receiving item information corresponding to the first card information from the database and setting a property of the item differently according to the level information of the card reader and then applying the item to a game.