"I think we've got to see dialogue replacing tear gas and pepper spray," he told BBC radio's World At One programme.
He added: "In order to save face for Beijing, and for the Hong Kong government, the right thing to do is to embark on a new period of consultation, make it genuine consultation."
The demonstrators are demanding full universal suffrage after Beijing said it would allow elections for Hong Kong's next leader in 2017 but would vet the candidates.
Beijing's proposals are "a breach of what the Chinese authorities themselves promised Hong Kong. They said that these matters were within the autonomy of the Hong Kong government and now they are reneging on that", Patten said.
He said the protesters filling the streets of Hong Kong had legitimate grievances.
"The suggestion that all this is being stirred up by outside agitators is a slur on all these people in Hong Kong, many of them very young, who are standing up for what they were promised," he said.
"The fact that it's been this badly handled, of course, brings into question whether or not Chinese authorities and those who represent them in the government of Hong Kong have actually taken the Sino-British joint declaration as seriously as they should," Patten said.
Patten suggested that the Chinese government's representatives in Hong Kong had not conveyed the strength of feeling about democracy in the city-state.
But he said he did not believe there would be a violent crackdown similar to that in Tiananmen Square in 1989.
"I cannot believe that the Chinese leadership would be so crazy," the former governor said.
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