Fetal Heart Rate (FHR) is a routine perinatal test and one of the main physiological indices to evaluate the health status of pregnant women and fetuses. In contrast to existing contact FHR detection technology, we propose a convenient and inexpensive noncontact FHR monitoring method based on Eulerian video magnification. The color signal in video is amplified and PhotoPlethysmoGraphy (PPG) is used to extract microvascular blood volume pulsar signal after removing maternal noise. The FHR can be estimated by calculating the power spectral density of the signal. Experiments show that the accuracy of detecting FHR can reach 96% using clinical measured data as the standard.