A method and a system for prompting a signal coverage area are disclosed, which relate to the field of mobile communications. The method for prompting the signal coverage area disclosed in the embodiment of the present document includes: when detecting a signal coverage area searching instruction from a user, a mobile terminal performs positioning operation, acquiring current location information of the mobile terminal, and according to signal strength around a current location of the mobile terminal, determining a list of blind areas around the current location; and the mobile terminal prompting the user to open a map, and displaying the current location of the mobile terminal on the map, and displaying signal coverage areas near the current location according to the list of blind areas. The embodiment of the present document also discloses a system for prompting a signal coverage area.