Abstract: A system of automatically receiving notification applied to a portable device includes a first portable device transmitting position coordinates thereof to a server; the server receiving the position coordinates, storing the position coordinates to a database of the server, and updating previous position coordinates of the first portable device according to the position coordinates; the server finding a second user within the database matching customization conditions of a first user having the first portable device according to the position coordinates and the customization conditions of the first user; the server simultaneously transmitting a first push notification message to the first portable device and a second push notification message to a second portable device of the second user according to a push notification function.