How much from Tian Tan Buddha to Innovation Tower, Hung Hom, by bus?

There is no direct bus. You need to take bus no.23 from Ngong Ping to Tung Chung Cable Car Terminal. Then take Tung Chung Line to Nam Cheong and transfer to (West Rail Line to Hung Hom.
The total fare is 37.9HKD per person. The duration is about 105mins.

Hello, I checked on Google maps of the direction you've mentioned and it's taking me at least 2 hr. and 41 min (almost 3 hr) not 105mins. Not sure what I am doing wrong. By bus it's same amount of time, but less walking. So if I take bus 23 to bus E23 to bus 11 using Octopus card, will it be still 37.9HKd? Thank you.

Do you refer to the Jockey Club Innovation Tower, PolyU, Hung Hom?

Yes I am refering to the Jockey Club Innovation Tower, PolyU, Hung Hom.

Sorry, I cannot find the bus route No.23 - No.E23 - No.11 on the map.
You can go to there by the following way:
Take bus no.23 from Ngong Ping to Tung Chung Fire Station. Then take bus no.E32 to LANTAU LINK TOLL PLAZA. Transfer to bus no.A22 to Wylie Road, Gascoigne Road. The whole way takes around 105 mins. The ticket fare is 54 HKD per person. After arriving, walk southeast around 400 meters to find the destination.