The invention discloses a solar device and a connection method thereof. The solar device comprises a solar module, wherein the four edges of the solar module are wrapped with a protecting frame, uppercorner blocks are symmetrically buckled and connected to the two corners of the upper side of the protecting frame, lower corner blocks are symmetrically buckled and connected to the two corners of the lower side of the protecting frame, an upper edge block and a lower edge block are respectively symmetrically buckled and connected to the middles of the upper end and the lower end of the protecting frame, and a left edge block and a right edge block are respectively symmetrically buckled and connected to the middles of the left end and the right end of the protecting frame. By means of multidirectional fixed joint among the upper corner block, the lower corner block, the upper edge block, the lower edge block, the left edge block and the right edge block of the solar device disclosed by the invention, a plurality of the solar modules can be quickly and firmly spliced and combined.