Research on test of micro flux-gate magnetometer is an important part of the whole study. A test system for subsequent signal processing is realized on platform built by using probe card and Lab VIEW program. This test system can test micro fluxgate probe before packaging. This method can solve the problem in test of micro fluxgate magnetometer. A micro fluxgate probe and a fluxgate prototype are tested by this system respectively. Tests results show that the optimal excitation frequency of the micro fluxgate probe is 3. 2 MHz and the sensitivity of fluxgate prototype is 34. 8 V/T. Experimental result verifies this test system can be used for test of micro flux-gate magnetometer and lay a solid foundation for the study on micro fluxgate magnetometer.