According to the Seismo-Geothermics theory about methods of intracrustal strong earthquake and volcano prediction, the ANSS earthquake catalogue from the Northern California earthquake data center and the GVP volcano data from the Smithsonian Institution, and extensive study of the seismic activities and the seismic cone structure in the Ecuador seismic cone, the author of this paper preliminarily thinks that the Ecuador seismic cone represents a left-hand structure, which the alternate tension with relaxation caused by deep seismic activity rhythm controls the intracrustal strong earthquakes and volcano activities in the earthquake affected area of the seismic cone. The volcano activities release the large heat energy of heat storage layer and the intracrustal strong earthquakes are trying to clear the trench in northwestern South America to keep the freedom of activity of hand type structure. Because deep seismic activity is several years earlier than the intracrustal earthquake activities of cone affected area, there is enough time for people to prepare, which allows the prediction of strong earthquake and volcanic activity in the crust in the seismic cone possible. Although there is no high precision earthquake catalogue in the Ecuador seismic cone, it has a single structure and clear aims of strong earthquakes and volcanic activities, and a successful prediction example. So it is a superior earthquake research environment, and is worth our attention.