The $US1 million ($A1.5 million) portfolio is mostly made up of bitcoins but also includes a US dollar-based stablecoin and a tokenised deposit, all bought through an exchange it said, without giving any more details.
"The purpose of the portfolio is to gain practical experience with holding digital assets and to implement and test the necessary related processes," the central bank said.
It will be held separately from the bank's international reserves, and will not be actively increased, it added.
"In the test portfolio, the central bank will test the whole chain of processes associated with the purchase, holding and management of digital assets - from technical administration of keys and multi-level approval processes, through crisis scenarios and security mechanisms, to verifying anti money-laundering compliance," the bank said.
Czech central bank governor Ales Michl, who originally floated the idea of looking at bitcoin in January, said new ways of making payments and investments were emerging and the central bank wanted to be ready.
"It is realistic to expect that, in the future, it will be easy to use the crown to buy tokenised Czech bonds and more besides – with one tap an espresso; with another an investment such as a bond or another asset that used to be the preserve of larger investors," Michl said in the statement.
"As a central bank, we want to test this path."
