Satellite-derived sea surface temperature (SST) images from March to August of 2008-2012 have been used to detect oceanic fronts based on the Cayula-Cornillon edge detection algorithm and to examine its spatio-temporal effects on sailfish catch in the Kuroshio waters east of Taiwan. The preliminary results are as follows: 1. Monthly SST images of Kuroshio waters have been processed and analyzed. It shows that the low monthly average SST is 25.2℃ in March and 29.0℃ in August. Ocenaic fronts with a large SST gradient were usually detected from March to May. 2. A total of 920 daily oceanic fronts and their monthly frontal probabilities have been extracted and calculated using the OSTIA SST images in the Kuroshio waters east of Taiwan. 3. More oceanic fronts had been found in May or June in each year, their frontal probabilities are 4.52% and 3.49%, respectively. The high frontal probabilities in May and June were associated with their corresponding monthly high sailfish catch in Kuroshio waters east of Taiwan. 4. The positive correlation (r=0.45) between the distances from Kuroshio axis to the eastern coast of Taiwan. 5. The satellite-derived SST images database was set up to provide our fishermen finding suitable fishing grounds. It can reduce costs of fuel consumption and improve the efficiency of fishing operations.