The invention relates to a converter valve and valve hall joint heat exchange system for direct-current transmission. The system comprises a converter valve loop (I) used for converter valve heat exchange and a valve hall loop (II) used for valve hall heat exchange, media flowing out of a converter valve loop heat exchanger (1) are divided into at least two ways, the first way flows through a converter valve to return to a converter valve loop circulating pump (2), and the second way returns to the converter valve loop circulating pump (2) after passing through a valve hall air conditioning condenser (6). Through a valve hall air conditioning, the converter valve loop and the valve hall loop are jointed, the valve hall air conditioning uses the media already cooled or heated by the converter valve loop and needs to be provided with condensation energy like an original valve hall air conditioning, the condenser can adopt a shell-tube radiator, and energy consumption and cost of the valve hall air conditioning are reduced.