A safety box system, for the temporary storage of valuables and being capable to be installed on a mast, comprising: a support base comprising a first plastic component and a second plastic component, wherein the support base is removable and detachable; a safety box made up of plastic and having a triangular shape, comprising: a main body comprising five sides wherein two of the five sides have a triangular shape, and wherein one of the two triangular sides acts as a door; an electronic lock and an electronic key-bracelet; a rear detachable cover, for covering the support base and at least a portion of the mast when the safety box is mounted on the mast, wherein the rear detachable cover comprises an advertising surface; wherein the safety box is mounted on the first component of the support base, the support base being configured to be attachable onto the mast by the second component of the support base, wherein the safety box is detachably connected to the first component with two long protrusions and the first and second components are attachable to the mast by clamping; wherein the safety box is adapted to be opened through automatic opening of the door with the help of a spring after unlocking the electronic lock with the electronic key-bracelet; and wherein the safety box further comprises an anti-vandalism mechanism offering protection against violation of the door by fitting a protruding rim of the main body of the safety box between small length protrusions built into the door of the safety box and a perimeter of the door. a support base comprising a first plastic component and a second plastic component, wherein the support base is removable and detachable; a safety box made up of plastic and having a triangular shape, comprising: a main body comprising five sides wherein two of the five sides have a triangular shape, and wherein one of the two triangular sides acts as a door; an electronic lock and an electronic key-bracelet; a main body comprising five sides wherein two of the five sides have a triangular shape, and wherein one of the two triangular sides acts as a door; an electronic lock and an electronic key-bracelet; a rear detachable cover, for covering the support base and at least a portion of the mast when the safety box is mounted on the mast, wherein the rear detachable cover comprises an advertising surface; wherein the safety box is mounted on the first component of the support base, the support base being configured to be attachable onto the mast by the second component of the support base, wherein the safety box is detachably connected to the first component with two long protrusions and the first and second components are attachable to the mast by clamping; wherein the safety box is adapted to be opened through automatic opening of the door with the help of a spring after unlocking the electronic lock with the electronic key-bracelet; and wherein the safety box further comprises an anti-vandalism mechanism offering protection against violation of the door by fitting a protruding rim of the main body of the safety box between small length protrusions built into the door of the safety box and a perimeter of the door.