The invention discloses an automatic suspension bridge cable strand temperature measuring system. The system is used for measuring temperature of main cable strands in different positions of a suspension bridge, and the suspension bridge comprises a suspension cable (1), a cable tower (2), an anchorage (3), a suspender (4) and a bridge deck (5). The automatic suspension bridge cable strand temperature measuring system comprises a temperature measuring device (11) and a data acquisition control device (12), wherein the temperature measuring device (11) comprises a temperature measuring probe, atemperature control module, a Lora wireless transmission module and a first power supply, the data acquisition control device (12) can conduct unified standardized processing on data information of the temperature measuring device (11), so that the collected temperature information can be stored in a background database. According to the system, over-river cable strand bundles are divided into nine sections for monitoring, five temperature values of a cross section of each cable strand bundle are monitored, the measurement precision and reliability are guaranteed, and the system has the technical effects that the temperature of the cable strands of the suspension bridge is accurately measured.