How to travel using mtr from ocean park to panda hotel?

You can take South Island Line to Admiralty and transfer to Island Line, then transfer to Tung Chung Line at Hong Kong, and another transfer to Tsuen Wan Line at Lai King. Get off at Tai Wo Hau and take bus 86M to Castle Peak Rd-Tsuen Wan. Walk southeast for several minutes, you will get there.

Or you can use buese, which is more simple: take 171 to Mei Foo Railway Station and then transfer to 38A to Panda Hotel.