These data are the compressional wave waveform data obtained by Ba et al. (2019) through ultrasonic experimental measurements on carbonates at different temperatures. In the package of data, each folder of 1, 2, 4, 5, 6, 7, 8, 9, 10 and 11 indicates sample number, respectively. For each sample with different pore fluids, waveforms measured at different temperatures are saved as different TXT files. For the title of each TXT file, it includes the sample number, pore fluid and temperature value. For instance, “1_Fullwater_20℃_80 MPa” denotes that sample 1 with the full water saturation is measured at the 20℃ and confining pressure of 80 MPa, while “2_Fulloil_140℃_20 MPa” denotes that sample 2 with the full oil saturation is measured at 140℃ and confining pressure of 20 MPa. The package also contains the TXT files of sample length and system delay time.