how can we go from olympic station mtr to repulse bay?

There is no direct transport. You can walk to the Foo Kwai Street, Tai Kok Tsui Road to take the bus No. 971 to Old Pok Fu Lam Kennels, Victoria Road. Then transfer to another bus No 73 to the Repuls Bay Beach. The fare is HKD16.8 and the travel time is about 90 – 100 mins.