A switch device for water conduit valve comprises a valve body having a water inflow passage bifurcated to form more than one water outflow passage, a first water inlet and a second water inlet disposed between the water inflow passage and the water outflow passage, a magnetic valve switch device connected to the first water inlet and a manual control switch device connected to the second water inlet to provide a user to freely select controlling water flow that is introduced into the water outflow passage from the first water inlet or the second water inlet through any switch device.