P Premature babies are babies born earlier than the expected time, which is 9.25months or 37 weeks. The outside world, which has a temperature and environmentthat is much different from when it was in the mother's womb, causes babies bornprematurely to experience a decrease in temperature because their bodies havenot been able to adapt. This system is designed so that babies born prematurelycan feel the temperature as if they were in the womb (32-35 ºC), this system isdesigned using a fuzzy system to control the temperature of the incubator room.Arduino Mega is responsible for regulating the output of the light dimmer basedon the load cell sensor readings and the DS18B20 temperature sensor andmeasuring body temperature readings using the MLX90614 sensor, NodeMCU tomeasure the baby's heart rate readings using the MAX30100 sensor module andNodeMCU as the recipient of the results of the data sent by Arduino Mega.Furthermore, the data transmission process will use a NodeMCU which can beconnected to the internet network and the received reading data will be sent to theBlynk platform and accessed via a smartphone. NodeMCU is able to providenotifications in the form of pop ups as well as sound that is active simultaneously,if the measurement values from the load cell sensor, incubator temperature, heartrate and body temperature are outside the normal range. Based on the results ofsensor testing that has been carried out, the average error value of the bodytemperature sensor reading (MLX 90614) is 0.24%, the average error of the heartrate sensor reading (MAX 3100) is 1.97%, the average error of the weight sensorreading is 0.119%, the average error of the room temperature sensor reading is0.174 %. In controlling the incubator temperature, based on tests carried out, thelength of time from a temperature of 29 ºC with a load of 1000 gr to 35 oC rangesfrom 1 minute 45 seconds while with a load of 2500 gr to 32 ºC it ranges from 1minute 5 seconds.