The invention provides a fusion positioning method and device, and relates to the field of indoor and outdoor positioning. The method comprises the steps of: 1, enabling a scheduling terminal to measure the measurement quantity of each device under a specified type of reference device; 2, dividing all measurement quantities under a single reference equipment type into different intervals accordingto the reference equipment type and an interval threshold thereof; 3, determining an energy-saving and bandwidth-reducing measurement strategy of the round; 4, enabling the scheduling terminal to perform measurement reporting based on the new measurement strategy; and 5, updating the interval reference equipment member according to the reporting result, if the change rate of the updated intervalreference equipment member is greater than the proportion threshold 1, skipping to the step 1, and otherwise, skipping to the step 5. By adopting the scheme provided by the invention, the number of the reference equipment to be measured, the measurement frequency of the reference equipment and the measurement quantity report information amount are effectively reduced, the terminal power consumption and the measurement quantity report bandwidth overhead in the fusion positioning process are further optimized, and the practical application value of the fusion positioning scheme is finally improved.