The invention discloses a printer, a method, a system and a processor for manufacturing a printed circuit board (PCB). The method comprises the following steps of: determining relevant characters, such as a line position, a welding pad, a via position, a solder mask position and a character position of the PCB according to the acquired image information of the PCB to be printed; controlling a PCB fixing platform and a multifunctional printer head to operate; and printing the characters, such as a line, a welding pad, a via, a solder mask and a character of the circuit board on the PCB to be printed. According to the method, the PCB can be directly printed without manual coating of ink or exposure and development by using chemical substances, so that the manufacturing process of the PCB is simple and excessive equipment, the consumption of human resources and chemical resources and the pollution are reduced. Meanwhile, the PCB fixing platform and the multifunctional printer head are driven to operate according to the determined line characters, and further the printing position can be accurately controlled; and the printed PCB is higher in precision, so that the manufactured PCB is better in performance.