The invention provides a method for determining or optimizing input and distribution of geophones or devices in a three-dimensional earthquake. According to the invention, through an established mathematic expression describing the relation between a collected shot number and a geophone input number, the optimized device input number and the optimized distribution method which are stable and accurate can be acquired and even the optimal device input number and the optimal distribution method which are stable and accurate can be acquired. In three-dimensional seismic data collection construction organization phase, the cost is reduced effectively, the working efficiency is improved, the improvement of economical efficiency of three-dimensional seismic exploration is promoted, three-dimensional seismic data collection cost is optimized and the method has a good prospect.