Based on the systematic analysis of the scientific.train of thought of the present various seismometry earthquake prediction methods, it is considered that the seismomptry earthquake prediction methods can be basically divided into two kinds. One bine is that some occurred earthquakes are regarded as the "cause" of coming earthquakes, that is as the occurred earthquakes produce effect on regional stress fields, which result in the occurrence of relatively strong earthquake. This kind includes relatively more prediction methods such as gap, belt, b-value, earthquake migration, correlation earthquakes and other methods derived by them. The other kind is that some occurred earthquakes are regarded as the "result" of the strengthening of regional stress fields, that is, the occurred earthquakes are one reflection of the strengthening Process of regional stress fields, and the coming earthquakes are not certainly the result caused by the occurred earthquakes. This kind includes the methods such as "seismic window", small earhquake group activity etc. In the first kind, all the prediction methods try to extract the coming earthquake's information horn earthquake three elements, and the concrete way of doing that is to use a certain profile of multidimentional space of earthquake three elements. In order to extract comprehensive information from multidimentional space of all the factors of seismic activity, we add a breaking plane orientation to each earthquake to form the fourth earthquake element, and based on the fourth earthquake element, the function of seismic comprehensive effect field is established. The function of seismic comprehensive effect field includes many kinds of scientific train of thoughts and prediction experience of seismometry seismic prediction methods, thus it can form the comprehensive prediction method of seidstnometry.