Pilar said competition timetables could be scheduled to offset the effects of Hong Kong's August heat and humidity on the horses.
"The atmosphere will be fantastic. People love horses all over China but in Hong Kong they know a lot about them and the atmosphere will be great," Pilar said.
BOCOG executive vice president Wang Wei said the move was the "best possible solution."
"We are convinced that the Hong Kong venue will enhance the quality and the excitement of the Games in 2008," Wang said.
When Melbourne hosted the 1956 Olympics, equestrian events were held in Sweden because of Australia's strict quarantine restrictions.
Former British colony Hong Kong reverted to Chinese rule in 1997 but maintains its own capitalist economy and independent legal system.
Hong Kong had lobbied hard to host the equestrian events, planned for the Shatin racecourse complex and surrounding Penfold Park.
"We'll be making sure it will be something they won't forget," the president of the territory's Olympic committee, Timothy Fok, said.
Pilar said her federation planned to work with BOCOG in setting up an equestrian training and competition center outside Beijing as a legacy of the games.
The center, whose location will be decided next year, would be surrounded by a 10km disease-free zone.
RSS