This gentlemen is a divine matchmaker. He refers to a list given to him by a goddess, and using invisible red thread ties together those destined to marry.
He can be found in all sorts of temples, though he has few shrines of his own. The loveless and heartbroken petition him for help finding Mr or Ms Right. Sometimes they write down their requirements/hopes on a small piece of paper, and tie it with red thread to a board beside the altar. Some of those who later find love come back and leave behind one of their wedding photos as proof of his powers.
The photo here was taken in Chiayi's Cheng Huang Temple.