Coffee machine

The present invention is a coffee machine comprising: a water container for accommodating water; a bean housing part for housing coffee beans; a grinding edge; a powder storage part for storing coffeepowder; an input unit; a detection unit; and a water supply unit. The grinding blade is driven to rotate in the bean accommodating part, and coffee beans are crushed to generate coffee powder. The input unit is configured so that a user can input information relating to the amount of coffee extracted by the powder storage unit. The detection unit detects information relating to at least one of the volume and the weight of the coffee beans housed in the bean housing unit. The water supply unit supplies the water in the water container to the powder storage unit on the basis of the informationrelating to the amount of coffee inputted to the input unit and the information detected by the detection unit. According to the present invention, an appropriate concentration of coffee can be extracted according to the type