The cavitation phenomenon is a general indication in the operation of centrifugal pump. An indication of the appearance of cavitation is the formation of bubbles which then break suddenly when the pressure changed on the suction side of the pump. The formation of cavitation bubbles can cause fault to the inner pump components. The fault that often results from cavitation phenomenon is affected in the impeller. This fault is usully identified through noise and vibration generated. Therefore, a method is needed to detect early cavitation phenomenon at the centrifugal pump. This research was conducted to develop cavitation detection methods using the vibration spectrum and envelope spectrum by comparing between low frequency ranges of 0-4kHz and high frequency ranges of 4kHz-8,5kHz. In this study, cavitation detection in conducted by recording vibration signals that occur at centrifugal pump using an accelerometer. The data obtained is then transformed into the frequency domain (vibration spectrum) and envelope spectrum used FFT (Fast Fourier Transform). The result of the data processing were compared between normal condition and level 1, 2, and 3 cavitation. Comparisons were made on each vibration spectrum and envelope spectrum with low frequency and high frequency limit. The result of this study showed that the vibration spectrum with low frequency limit can detect the formation of level 3 cavitation with on increase in shaft frequency amplitude (47.26 Hz) and ½ BPF (149.6 Hz). Where as early cavitation or level 1 cavitation was identified through the envelope spectrum with high frequency limit. The result was elaborated a decrease in amplitude occured gradually along with increasing levels of cavitation.