Filler dispersion in the rubber compound is a factor related to the processability and the compound performance. Especially, when silica is used as a filler, the agglomeration becomes severe due to the hydrogen bonding (filler-filler interaction) between silica, which causes the processability is deteriorated. Therefore, many researches are being conducted on the improvement of the silica dispersion in the compound. In order to improve the silica dispersion, a silane coupling agent is added, it causes a reduction of filler-filler interaction by silanization reaction. However, long mixing time is required at high temperature for the silanization reaction and there is a problem such as VOC (alcohol) generation. In addition, when high silica loading, it is difficult to secure the appropriate processability and to reduce silica agglomeration. Therefore, new technologies and materials have been researched for good silica dispersion even in high loading silica compounds, and one of them is silica wet masterbatch (WMB). Silica WMB means a material, obtained by solidification of silane modified silica with rubber solution or rubber latex. Therefore, WMB does not require silanization reaction during mixing process. In addition, silica dispersion is improved by using WMB. In this study, ESBR/silica WMB using emulsion styrene-butadiene rubber (ESBR) was studied. In detail, the degree of hydrophobation of the bis [3-(triethoxysilyl)propyl]tetrasulfide (TESPT) modified silica was measured. And then, we had researched the effect of coagulant type on the processability, silica dispersion, wear properties, and mechanical properties. As a result, all of WMB compounds with different coagulants exhibited better processability than dry masterbatch compound (DMB, conventional mixing). Especially, WMB compound with calcium chloride as a coagulant had excellent silica dispersion, high filler-rubber interaction, and abrasion resistance.