A control method of a laundry machine comprising a drum and a balancer (310; 330) having a movable gravity center and mounted to the drum, the control method comprising: a laundry distributing step configured to distribute the laundry loaded into a drum uniformly, with rotating the drum at a relatively low speed, and a spinning step configured to rotate the drum at a relatively high speed and remove the moisture from the laundry, the spinning step comprising a transient region passing step for accelerating the drum from a start RPM to an end RPM of the transient region, wherein the transient region is a predetermined RPM band including at least one resonance frequency which generates resonance according to the system of the laundry machine, a first balancing step and an accelerating step, the first balancing step being configured to rotate the drum at a constant speed for a predetermined time period; the control method further comprising: a vibration sensing step configured to sense vibration of the drum in the transient region passing step and the accelerating step; a transient region passing determining step configured to determine whether the rotation speed of the drum passes a transient region in case the vibration of the drum sensed in the vibration sensing step is a preset vibration value or more; and a drum rotation speed controlling step configured to perform the laundry distributing step again if it is determined that the rotation speed of the drum does not pass the transient region in the transient region passing determining step, and to perform the accelerating step after decreasing the rotation speed of the drum to a predetermined RPM and to constantly rotate the drum at the RPM for a predetermined time period at least one time if it is determined that the rotation speed of the drum passes the transient region in the transient region passing determining step. a laundry distributing step configured to distribute the laundry loaded into a drum uniformly, with rotating the drum at a relatively low speed, and a spinning step configured to rotate the drum at a relatively high speed and remove the moisture from the laundry, the spinning step comprising a transient region passing step for accelerating the drum from a start RPM to an end RPM of the transient region, wherein the transient region is a predetermined RPM band including at least one resonance frequency which generates resonance according to the system of the laundry machine, a first balancing step and an accelerating step, the first balancing step being configured to rotate the drum at a constant speed for a predetermined time period; the control method further comprising: a vibration sensing step configured to sense vibration of the drum in the transient region passing step and the accelerating step; a transient region passing determining step configured to determine whether the rotation speed of the drum passes a transient region in case the vibration of the drum sensed in the vibration sensing step is a preset vibration value or more; and a drum rotation speed controlling step configured to perform the laundry distributing step again if it is determined that the rotation speed of the drum does not pass the transient region in the transient region passing determining step, and to perform the accelerating step after decreasing the rotation speed of the drum to a predetermined RPM and to constantly rotate the drum at the RPM for a predetermined time period at least one time if it is determined that the rotation speed of the drum passes the transient region in the transient region passing determining step. a vibration sensing step configured to sense vibration of the drum in the transient region passing step and the accelerating step; a transient region passing determining step configured to determine whether the rotation speed of the drum passes a transient region in case the vibration of the drum sensed in the vibration sensing step is a preset vibration value or more; and a drum rotation speed controlling step configured to perform the laundry distributing step again if it is determined that the rotation speed of the drum does not pass the transient region in the transient region passing determining step, and to perform the accelerating step after decreasing the rotation speed of the drum to a predetermined RPM and to constantly rotate the drum at the RPM for a predetermined time period at least one time if it is determined that the rotation speed of the drum passes the transient region in the transient region passing determining step.