A program-converting module for a multi-axis cooperated machine and a program-converting method. Machining programs and mechanism data of a plurality of first machines are input to a first input module. Mechanism data of a plurality of second machines are input to a second input unit. A setting unit sets at least one of the first machines to be a source machine, and sets one of the second machines to be a target machine. A conversion unit uses a kinematical method to convert the machining program of the source machine into a machining program applicable to the target machine based on the mechanism data of the source and target machines, without requiring CAD/CAM software.