The handling fee is 15 yuan. According to the query of Qinnong Bank's credit card information, a handling fee of 15 yuan is required to withdraw 15,000 yuan in Qinnong Bank's credit card. Qinong Bank's credit card cash withdrawal handling fee is charged at 1% of the cash withdrawal amount, with a minimum of 1 yuan and a maximum of 100 yuan. Therefore, to withdraw 15,000 yuan in cash, the handling fee required is 150 yuan, with a minimum of 1 yuan.