NOVELTY - A fuel cell device capable of adjusting operational parameters, comprises a control circuit for receiving the status signal from fuel cell boards, controlling over an anodic fuel supplier and an anode regulator based on the status signal to make a concentration, a flow rate, and a temperature of an anodic fuel injected into the fuel cell boards meet predetermined parameters, and controlling a cathodic fuel supplier based on the status signal to make the flow rate of injected cathodic fuel into the fuel cell boards meet a predetermined parameter.    USE - Used as e.g. direct methanol fuel cell and as any other fuel cell with liquid anodic fuels.    ADVANTAGE - The fuel cell can set various operational parameters so that the fuel cell board generates power with the set parameters. The performance of the fuel cell board is controlled constantly, and every related operational parameter is adjusted dynamically.    DETAILED DESCRIPTION - A fuel cell device capable of adjusting operational parameters, comprises:    (a) fuel cell board(s) comprising an electrically connected interface for communicating a status signal(s) generated by the fuel cell boards in operation;    (b) an anode regulator connected to anodic fuel inlets and anodic fuel outlets of the fuel cell boards, and comprising a gas-liquid separator in a form of a vessel to recycle and store a fluid out of the anodic fuel outlets; a solution mixer in a form of a vessel connected to the anodic fuel inlets, and containing a fluid from the gas-liquid separator, a water tank, and an anodic fuel tank; and a first pump for propelling fluids passing through the fuel cell boards, gas-liquid separator, and solution mixer to cycle, and regulating the flow rate of fluids;    (c) a cathode regulator to adjust an amount of cathodic fuels supplied for cathodes of the fuel cell boards, and comprising a fan for propelling air and controlling a flow rate and air flowing in the cathodes of the fuel cell boards, where air comes from outside;    (d) an anodic fuel supplier connected to the anode regulator, and comprising water tank being a container; anodic fuel tank being a container; a second pump positioned between the water tank and the solution mixer to adjust an amount of water flowing from the water tank to the solution mixer; and a third pump positioned between the anodic fuel tank and the solution mixer to adjust an amount of a concentrated anodic fuel flowing from the anodic fuel tank to the solution mixer; and    (e) a control circuit for receiving the status signal from the fuel cell boards, controlling over the anodic fuel supplier and the anode regulator based on the status signal to make a concentration, a flow rate, and a temperature of an anodic fuel injected into the fuel cell boards meet predetermined parameters, and controlling a cathodic fuel supplier based on the status signal to make the flow rate of injected cathodic fuel into the fuel cell boards meet a predetermined parameter.    The three pumps and the fan are electrically coupled to the control circuit and controlled by the control circuit. The control circuit comprises a first temperature sensor to sense a temperature of a fluid within the solution mixer; a concentration meter to detect a concentration of a fluid within the solution mixer; a controller to instruct the three pumps according to the status signals, a sensed signal from the first temperature and a detected signal from the concentration meter; a second temperature sensor for sensing an environmental temperature around the fuel cell boards; a communication interface coupled to an external electronic device for exchanging data with each other; and a voltage-regulated circuit for regulating a voltage output by the fuel cell boards to be constant. It is disposed on a printed circuit substrate.    DESCRIPTION OF DRAWING(S) - The figure illustrates the structure of a fuel cell device able to regulate operational parameters.