The invention provides a sulfur-containing and salt-containing organic waste liquid and waste gas pollution-free treatment device and method. An inlet of an incinerator in the device is connected with a sulfur-containing organic waste gas supply system, a sulfur-containing and salt-containing organic waste liquid supply system, a fuel gas supply system and a combustion-supporting air supply system respectively; an outlet of the incinerator is connected with an after heat recovery system; and the after heat recovery system is connected with a desulfurization system. The method comprises the following steps of: conveying sulfur-containing organic waste gas, sulfur-containing and salt-containing waste liquid, natural gas and air into a combustion chamber of the incinerator; feeding produced high-temperature flue gas into a waste heat boiler and an economizer in sequence; and feeding the flue gas into a cooling, concentrating and absorbing tower and a washing and absorbing tower in sequence. According to the device and the method disclosed by the invention, the sulfur-containing and salt-containing organic waste liquid and the sulfur-containing and salt-containing organic waste gas produced during production of methionine are simultaneously fed into the combustion chamber of the incinerator in two paths, and high-temperature decomposition of the sulfur-containing and salt-containing organic waste liquid and the sulfur-containing and salt-containing organic waste gas in the combustion chamber is realized, so that the requirement of environmental friendliness is met, a fuel is also saved, and double effects of energy conservation and pollution-free treatment are achieved.