我整咗hydrated CuSo4, 點dry up佢

Yes, you can do so.
However, this is not a good method.

Usually, to dry hydrated copper(II) sulphate, CuSO4•5H2O,firstly use a dry filter paper to absorb water on the surface of the hydratedsalt, and then put the hydrated salt in a desiccator for some days.
In a desicator, the air is dry as the water vapour inside the desiccator is totallyabsorbed by the drying agent. In such adry space, the remained water on the surface of hydrated copper(II) sulphatecan easily evaporate as water vapour, which is then absorbed by the dryingagent.
The cross-section of a desiccator is shown in the following diagram :
http://t3.gstatic.com/images?q=tbn:ANd9GcRdHiWjml9r4o09rEaZV5vgBpBI2CEsEHO1k_GJoe5nrvXgHnZBFw

To dry hydrated copper(II) sulphate, NEVER heat it with a Bunsen flame. This is because the high temperature providedby the Bunsen flame will dehydrate the hydrated salt to give anhydrouscopper(II) sulphate.
CuSO4•5H2O(s) →CuSO4(s) + 5H2O(g) ... (Strong heat)
Further strong heating would cause the anhydrous copper(II) sulphate to decomposeto copper(II) oxide and sulphur trioxide.
CuSO4(s) → CuO(s) + SO3(g)... (Strong heat)

"To dry up" usually means to remove water from the surface of a substance.

To make anhydrous salt from a hydrated salt is "to dehydrate".

Depends on what do you mean by "dry up".
To dry up the hydrate crystals, water bath is not needed; air-dry is alright.
To make anhydrous thing, water bath is not hot enough (requiring 200 degree) (Source: Wikipedia).

no.
it is recommended to place the hydrated CuSO4 in a crucible with its lid,
and then heat by bunsen flame