Flip and reposition the initial state of an object

Question

I tried to initialize a 3D object, but found it to be skewed initially, and the axis of rotation is in the lower right corner.

If the position of the axis of rotation is not in the center, it will be a little weird when the user rotates to watch it.

I tried to make an auxiliary line to see the state of the object as follows:

 private axes() {
    var axes = new THREE.AxesHelper(30);

    this.scene.add(axes);
    var gridHelper = new THREE.GridHelper(100, 30, 0x2C2C2C, 0x888888);
    gridHelper.position.y = -10;
    this.scene.add(gridHelper);
  }

How can I flip a 3D object and reset its center:

Or can I correct the placement of objects by moving the camera angle?