Chan said the meeting comes after days of stalled negotiations on the safe release of the hostages.
"Both sides have mutually guaranteed safety – [the meeting will be held] in an undisclosed location," she says.
The 23 South Koreans, who were working as health aid volunteers, were abducted on July 19 in the Qarabagh district of Ghazni province as they travelled by bus from Kabul to the southern city of Kandahar.
Two male hostages have been executed by the Taliban. Sixteen of the captives are women.
South Korea's government has called for its aid organisations to leave Afghanistan by the end of the month, citing safety reasons, a South Korean embassy official said on condition of anonymity.
The measure comes after the government banned its citizens from traveling to Afghanistan last month.
South Korean authorities will decide whether they can return to the country after "the situation settles down," the official added.
Ahmadi said the departure of South Korean aid workers would move forward negotiations with the Taliban.
"The pulling out of Korean aid workers will have an effect on our negotiation process because pulling out of Koreans from Afghanistan is part of our demand. It will have a positive effect," he said.
Cha Sung-min, a spokesman for the hostages' families in South Korea, said the mothers of several female hostages will travel to Dubai next week to seek help from the Arab world.
"The reason why we are sending women, especially mothers, to Dubai is that Islamic culture has more sympathy for women," he said.
Source: Al Jazeera and agencies