1. A method for controlling a surveillance system, the surveillance system comprising a plurality of cameras equipped with capturing direction adjustment capability, the method applied to a control circuit of the surveillance system, the method comprising: calculating monitoring regions of the plurality of cameras according to coordinates of the plurality of cameras, respectively, to generate space information of the monitoring regions, wherein any monitoring region of the monitoring regions comprises a union of a plurality of regions monitored by a corresponding camera within the plurality of cameras through capturing direction adjustment; automatically generating target patrol routes of the plurality of cameras according to the monitoring regions and according to a plurality of target points; and applying configurations corresponding to the target patrol routes to the plurality of cameras, respectively, to make capturing direction adjustment operations of the plurality of cameras correspond to the target patrol routes, respectively.