The multifunctional lamp/fan for field user consists of head lamp, fan head, hose, handle and base, and it is a lamp or fan when the changeable head lamp or the fan head is mounted. When the fan headand the head lamp are connected via a T-connector to the hose, it is a lamp and fan concurrently. By means of the built-in multifunctional control circuit, multiple-position switch and red LED's, thehead lamp may be used for lighting or as flash signal lamp. The red LED in handle may be used as tail lamp and its fan may change speed by the switch.