The invention relates to a synchronized method for a user word bank. The synchronized method comprises the step of storing a first cloud end user word bank inside at least one storage space. The synchronized method further comprises the steps of (1) filtering or expanding the first cloud end user word bank to obtain an intermediate result and (2) storing the intermediate result to a second cloud end user word bank inside one storage space. The synchronized method not only can meet a common requirement of the user word bank on various device ends, but also can enable the user word bank to be optimized by aiming at various device types or application environment. In addition, further provided is a synchronized server for the user word bank.