Abstract: In modern chicken farming, body temperature is an important indicator for determining health of laying hens．In order to understand temperature changes of captive laying hens, a wearable wireless temperature sensing monitoring system was used to conduct 24-hour temperature monitoring experiment on captive laying hens．Experimental results showed that body temperature of normal captive laying hens varied within range of 38.41～41.85 °C, presenting a certain circadian rhythm, the lowest point of body temperature throughout day occurred from 21: 00 to 22: 00．When febrile diseases occured, average body temperature of laying hens increased by 0.21～1.30 °C compared to normal conditions．During morning and evening periods, average abnormal increased in body temperature of diseased chickens was greater, making it easier to distinguish between normal and abnormal chickens compared to noon period．Temperature monitoring of layered cage raised laying hens could provide theoretical reference for establishing a chicken temperature and health judgment model, and it had important practical significance for accurately grasping health status of large-scale breeding populations of laying hens and improving production efficiency．