A universal charging device, the device comprising: a charging pack including at least one of an AC terminal for inputting an AC power, an AC/DC converter for rectifying the AC power to a DC power, a DC terminal for outputting a DC power of a first power value, a charging pack switch for turning on/off an output of the DC power, wherein a DC power of various power values in which the first power value increases or decreases can be outputted in response to increase/decrease in installation number of the charging packs and to whether each charging pack switch is turned on or off, and a charging speed of an electric vehicle can be adjusted in response to changes in power value of the DC power, characterized by a charging module in which a plurality of charging packs are connected in series or in parallel, wherein the charging module includes at least one of an AC input portion for commonly inputting the AC power to the AC terminal, a DC output portion for connecting the DC terminal in series or in parallel, and a charging module controller for data-communicating with the charging packs to individually control the charging packs in response to whether the charging pack switch is turned on or off, and a charging unit formed with an AC bus bar commonly connected to the AC input portion or a DC bus bar connected in series or in parallel to the DC output portion, wherein a plurality of charging modules is connected attachably and detachably in series or in parallel manners, and a power value of DC power outputted from the DC bus bar is variable in proportion to the number of charging modules installed at the charging unit. a charging pack including at least one of an AC terminal for inputting an AC power, an AC/DC converter for rectifying the AC power to a DC power, a DC terminal for outputting a DC power of a first power value, a charging pack switch for turning on/off an output of the DC power, wherein a DC power of various power values in which the first power value increases or decreases can be outputted in response to increase/decrease in installation number of the charging packs and to whether each charging pack switch is turned on or off, and a charging speed of an electric vehicle can be adjusted in response to changes in power value of the DC power, characterized by a charging module in which a plurality of charging packs are connected in series or in parallel, wherein the charging module includes at least one of an AC input portion for commonly inputting the AC power to the AC terminal, a DC output portion for connecting the DC terminal in series or in parallel, and a charging module controller for data-communicating with the charging packs to individually control the charging packs in response to whether the charging pack switch is turned on or off, and a charging unit formed with an AC bus bar commonly connected to the AC input portion or a DC bus bar connected in series or in parallel to the DC output portion, wherein a plurality of charging modules is connected attachably and detachably in series or in parallel manners, and a power value of DC power outputted from the DC bus bar is variable in proportion to the number of charging modules installed at the charging unit.