We present the integral field spectroscopic observations of ionized gas (H alpha and [N II]) using the PCWI, along with deep CO(2-1) observations by the '(U) over bar'(u) over bar receiver on JCMT for AGC 102004. The velocity field of H alpha shows an anomalous distribution in the northwestern (NW) disk. The H alpha spectrum is well-fitted by two Gaussian components, and the weak Gaussian component is dominated by the anomalous H alpha in the NW disk. The Gaussian fit center of H alpha emission is offset by +24.2 km s(-1) from the systemic velocity obtained from the H i emission. We derive the gas-phase metallicity, 12+log(O/H), using [N II]lambda 6583/H alpha ratio as a proxy. The mean value of 12+log(O/H) is 8.30 +/- 0.19 over the whole galaxy. The metallicity in the outer disk is lower than the detection limit of 7.72, indicating the metallicity gradient exists in AGC 102004. We speculate a minor/mini-merger event could have happened to the NW disk. CO(2-1) emission has nondetection in AGC 102004, reaching a noise level of 0.33 mK smoothed to 30 km s(-1). The upper limit of molecular gas mass in AGC 102004 is 2.1 x 107 M-circle dot with X-CO = 3.02 x 1020 cm(-2) (K km s(-1))(-1). The MH2 /M-HI(corr) of AGC 102004 is lower than 0.0037 and lower than that of normal galaxies.