The embodiment of the invention discloses a three-dimensional map construction method and device, a server and a storage medium. The method comprises the following steps: receiving crowdsourcing datasent by each crowdsourcing user in a target area, wherein each piece of crowdsourcing data at least comprises three-dimensional position information of each crowdsourcing user; and constructing a three-dimensional map corresponding to the target area according to a predetermined two-dimensional map corresponding to the target area and crowdsourcing data sent by each crowdsourcing user. The construction precision is high, the construction cost is low, and the construction coverage rate is more comprehensive.