Highway advertising board monitoring and early warning system

The utility model discloses an expressway advertising board monitoring and early warning system which comprises an all-in-one machine monitoring device, the all-in-one machine monitoring device comprises a shell, a circuit board is arranged in the shell, mounting blocks are arranged on the two sides of the circuit board, mounting grooves are formed in the two sides of the interior of the shell, springs are arranged in the mounting grooves, and the springs are arranged in the mounting grooves. One side of the spring is fixedly connected with the mounting block, the other side of the spring is fixedly connected with the mounting block, one end of the mounting block is located in the mounting groove, the other end of the mounting block is provided with clamping grooves, and the two sides of the circuit board are located in the two sets of clamping grooves respectively. And the positions of the mounting blocks can be conveniently adjusted, so that the mounting blocks extend out of or retract into the mounting gro