Mobile　objects　tracking　is　a　popular　field　in　computer　vision　community.　And　the　tracking　of　ground　mobile　object　by　UAVs　is　always　an　important　direction　in　UAV　autonomous　control　field.　In　this　paper,　we　employed　an　Unmanned　Aerial　Vehicle　to　track　a　mobile　object,　such　as　a　mobile　robot　on　the　ground.　In　this　work,　DJI　M100　quadrotor　was　employed　to　track　a　Guardian　mobile　platform.　And　the　quadrotor　was　being　equipped　a　UVC　camera　and　an　on-board　PC,　which　were　capable　for　our　system　to　tracking　mobile　targets.　Within　a　useful　tracking　system,　suitable　flight　controllers　on　the　quad-rotor　and　effective　image　recognition　algorithm　are　also　presented　for　reference　in　our　work.　Simulation　and　real　environment　experiments　were　executed　to　test　the　effeteness　of　the　proposed　approach.　©　49th　International　Symposium　on　Robotics,　ISR　2017.　All　rights　reserved.