hi i am Jerry and i just bought a dslr camera and it is amazing .. would you guys tell me that can i convert it to drone? or what should i have to do for it?

Only on a drone that has a modular gimbal and is compatible. You're probably looking at the Matrice drones which cost thousands and even that may not work depending on the camera you have.

If you want to have a RTF (ready to fly) system, buy a Matrice 600 and a Ronin-MX gimbal. Then you are good to go.

If you are a DIY man and depending on the weight of the camera, buy an S900 or S1000 airframe, an A3 (pro) flight controller, Lightbridge 2 video transmission system, enough LiPo's and finally a gimbal carrying the camera. For that unit i'd use a Gremsy gimbal.